Phil Reid [Fri, 24 Feb 2017 03:12:51 +0000 (11:12 +0800)]
rtc: ds3232: Call device_init_wakeup before device_register
The wakealarm attribute is currently not exposed in the sysfs interface
as the device has not been set as doing wakealarm when device_register
is called. Changing the order of the calls fixes that problem. Interrupts
are cleared in check_rtc_status prior to requesting the interrupt.
This is only set if an irq is defined. If irq registration fails then
set wakeup_capable to false. With this change the sysfs wakealarm
attribute will be left visible but it is non functional. rtcwake
still returns that the device is not enabled for wakeup.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Sean Nyekjaer [Thu, 23 Feb 2017 14:01:24 +0000 (15:01 +0100)]
rtc: pcf2127: bulk read only date and time registers.
Read control registers one by one and bulk read time registers.
This fixes when the clock is read, the watchdog counter register is zeroed.
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Gregory CLEMENT [Mon, 20 Feb 2017 17:38:49 +0000 (18:38 +0100)]
rtc: armada38x: Add support for Armada 7K/8K
The Armada 7K/8K use the same RTC IP than the Armada 38x. However the SOC
integration differs in 2 points:
- MBUS bridge timing initialization
- IRQ configuration at SoC level
Moreover the Armada 7K/8K have an issue preventing to get the interrupt
from alarm 1. This commit allows to use alarm 2 for these A7K/8K but to
still use alarm 1 for the Armada 38x.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Gregory CLEMENT [Mon, 20 Feb 2017 17:38:48 +0000 (18:38 +0100)]
rtc: armada38x: Prepare driver to manage different versions
In order to prepare the introduction of the A7K/A8K version of the RTC,
this commit introduces a new data structure. This structure allows to
handle the differences between the integration of the RTC IP in the
SoCs. It will be:
- MBUS bridge timing initialization
- IRQ configuration at SoC level
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Phil Reid [Fri, 17 Feb 2017 01:44:57 +0000 (09:44 +0800)]
rtc: ds3232: Add regmap max_register definition.
Add the max_register to the regmap_config definition. This allows
dumping of the device's registers via the regmap debugfs interface.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Phil Reid [Fri, 17 Feb 2017 01:44:56 +0000 (09:44 +0800)]
rtc: ds3232: Cleanup whitespace around register and bit definitions.
Whitespace was a combination of spaces and tabs.
Use spaces and align register / bit definitions.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Wed, 15 Feb 2017 16:35:27 +0000 (09:35 -0700)]
rtc: m48t86: remove unused platform_data
All users of this driver have been updated to allow the driver to
manage it's own resources and do the read/write operations internally.
The m48t86_ops are no longer used.
Remove the platform_data header and the support code in the driver.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Wed, 15 Feb 2017 16:35:25 +0000 (09:35 -0700)]
ARM: Orion5x: ts78xx: allow rtc-m48t86 to manage it's own resources
The rtc-m48t86 driver can now handle it's own resources and do the
read/write operations internally.
Pass the necessary resources to the driver and remove the m48t86_ops
platform data.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-By: Alexander Clouter <alex+kernel@digriz.org.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Wed, 15 Feb 2017 16:35:24 +0000 (09:35 -0700)]
ARM: Orion5x: ts78xx: remove RTC detection
The rtc-m48t86 driver now handles the RTC detection. Remove the
redundant code from the platform.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-By: Alexander Clouter <alex+kernel@digriz.org.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Wed, 15 Feb 2017 16:35:26 +0000 (09:35 -0700)]
ARM: ep93xx: ts72xx: allow rtc-m48t86 to manage its own resources
The rtc-m48t86 driver can now handle its own resources and do the
read/write operations internally.
Pass the necessary resources to the driver and remove the m48t86_ops
platform data.
Remove the, then unnecessary, static remapping for the registers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Wed, 15 Feb 2017 16:35:23 +0000 (09:35 -0700)]
rtc: m48t86: verify that the RTC is actually present
The RTC is an optional feature at purchase time on some Technologic
Systems boards. Verify that it actually exists by checking if the
last two bytes of the NVRAM can be changed.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Fri, 10 Feb 2017 18:11:57 +0000 (11:11 -0700)]
rtc: m48t86: add NVRAM support
This RTC has 114 bytes of NVRAM. Provide access to it via a binary
sysfs 'nvram' attribute file.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Fri, 10 Feb 2017 18:11:56 +0000 (11:11 -0700)]
rtc: m48t86: allow driver to manage its resources
Allow this driver to, optionally, manage it's own resources and do the
read/write operations if the platform does not provide them.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
H Hartley Sweeten [Fri, 10 Feb 2017 18:11:55 +0000 (11:11 -0700)]
rtc: m48t86: shorten register name defines
For aesthetics. Shorten all the register names by removing '_REG' from all
of them.
This helps fix all the checkpatch.pl issues.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Akinobu Mita [Tue, 7 Feb 2017 19:36:53 +0000 (04:36 +0900)]
bindings: rtc: correct wrong reference in required properties
There are currently two broken bindings descriptions for RTC:
maxim,ds3231.txt
pcf8563.txt
They broke because of a improper RST documentation conversion with
commit
8c27ceff3604b2 ("docs: fix locations of several documents that got
moved") and now reference to a non-existing file:
Documentation/devicetree/bindings/i2c/trivial-admin-guide/devices.rst
However, the original reference to i2c/trivial-devices should have never
been made in the first place.
This change fixes this issue by replacing with correct descriptions.
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Wei Yongjun [Thu, 9 Feb 2017 00:16:13 +0000 (00:16 +0000)]
rtc: sun6i: Fix return value check in sun6i_rtc_clk_init()
In case of error, the function of_io_request_and_map() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().
Fixes:
847b8bf62eb4 ("rtc: sun6i: Expose the 32kHz oscillator")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Alexandre Belloni [Wed, 1 Feb 2017 11:54:13 +0000 (12:54 +0100)]
rtc: sun6i: extend test coverage
COMPILE_TEST was wrongly placed, move it to the "depends on" line.
Also depend on COMMON_CLK as the driver now needs it to be properly
compiled.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Chen-Yu Tsai [Sun, 29 Jan 2017 10:13:43 +0000 (18:13 +0800)]
rtc: sun6i: Fix compatibility with old DT binding
Commit
847b8bf62eb4 ("rtc: sun6i: Expose the 32kHz oscillator") adds
a new clock for the rtc block with a 2 step probe mechanism. To share
the register region between both the clock and rtc instance, a static
pointer is used to keep the related data structure.
To preserve compatibility with the old binding, the data structure
should be saved as soon as the registers are mapped in, regardless
of the presence of the clock bindings, so that the rtc device can
retrieve it when it is probed.
This fixes the rtc device not probing when we use the updated driver
with an old device tree blob.
Fixes:
847b8bf62eb4 ("rtc: sun6i: Expose the 32kHz oscillator")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Guy Shapiro [Sun, 29 Jan 2017 09:57:19 +0000 (11:57 +0200)]
rtc: snvs: add a missing write sync
The clear of the LPTA_EN flag should be synced before writing to the
alarm register. Omitting this synchronization creates a race when
trying to change existing alarm.
Signed-off-by: Guy Shapiro <guy.shapiro@mobi-wize.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Enric Balletbo i Serra [Fri, 27 Jan 2017 17:43:46 +0000 (18:43 +0100)]
rtc: bq32000: add support to enable disable the trickle charge FET bypass
The bq32000 includes a trickle charge circuit to maintain the charge of the
backup supply when a super capacitor is used.
You can enable the charging circuit by setting 'trickle-resistor-ohms',
additionally you can set TCFE to 1 to bypass the internal diode and boost
the charge voltage of the backup supply. You might want to enable/disable
the TCFE switch from userspace (e.g when device is only connected to a
battery)
This patch introduces a new sysfs entry to enable and disable this FET
form userspace.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Maxime Ripard [Mon, 23 Jan 2017 10:41:50 +0000 (11:41 +0100)]
rtc: sun6i: Switch to devm_rtc_device_register
Now that we have a devm variant of rtc_device_register, switch to it.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Maxime Ripard [Mon, 23 Jan 2017 10:41:49 +0000 (11:41 +0100)]
rtc: sun6i: Expose the 32kHz oscillator
The RTC controls the input source of the main 32kHz oscillator in the
system, feeding it to the clock unit too.
By default, this is using an internal, very inaccurate (+/- 30%)
oscillator with a divider to make it roughly around 32kHz. This is however
quite impractical for the RTC, since our time will not be tracked properly.
Since this oscillator is an input of the main clock unit, and since that
clock unit will be probed using CLK_OF_DECLARE, we have to use it as well,
leading to a two stage probe: one to enable the clock, the other one to
enable the RTC.
There is also a slight change in the binding that is required (and should
have been from the beginning), since we'll need a phandle to the external
oscillator used on that board. We support the old binding by not allowing
to switch to the external oscillator and only using the internal one (which
was the previous behaviour) in the case where we're missing that phandle.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Maxime Ripard [Mon, 23 Jan 2017 10:41:48 +0000 (11:41 +0100)]
rtc: sun6i: Switch to the external oscillator
The RTC is clocked from either an internal, imprecise, oscillator or an
external one, which is usually much more accurate.
The difference perceived between the time elapsed and the time reported by
the RTC is in a 10% scale, which prevents the RTC from being useful at all.
Fortunately, the external oscillator is reported to be mandatory in the
Allwinner datasheet, so we can just switch to it.
Cc: stable@vger.kernel.org
Fixes:
9765d2d94309 ("rtc: sun6i: Add sun6i RTC driver")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Maxime Ripard [Mon, 23 Jan 2017 10:41:47 +0000 (11:41 +0100)]
rtc: sun6i: Add some locking
Some registers have a read-modify-write access pattern that are not atomic.
Add some locking to prevent from concurrent accesses.
Cc: stable@vger.kernel.org
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Maxime Ripard [Mon, 23 Jan 2017 10:41:46 +0000 (11:41 +0100)]
rtc: sun6i: Disable the build as a module
Since we have to provide the clock very early on, the RTC driver cannot be
built as a module. Make sure that won't happen.
Cc: stable@vger.kernel.org
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Linus Walleij [Sun, 22 Jan 2017 12:19:50 +0000 (13:19 +0100)]
rtc: gemini: Add device tree probing
This adds bindings and simple probing for the Cortina Systems Gemini
SoC RTC.
Cc: Janos Laube <janos.dev@gmail.com>
Cc: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Amelie Delaunay [Mon, 16 Jan 2017 10:08:53 +0000 (11:08 +0100)]
rtc: stm32: fix comparison warnings
This patches fixes comparison between signed and unsigned values as it
could produce an incorrect result when the signed value is converted to
unsigned:
drivers/rtc/rtc-stm32.c: In function 'stm32_rtc_valid_alrm':
drivers/rtc/rtc-stm32.c:404:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if ((((tm->tm_year > cur_year) &&
...
It also fixes comparison always true or false due to the fact that unsigned
value is compared against zero with >= or <:
drivers/rtc/rtc-stm32.c: In function 'stm32_rtc_init':
drivers/rtc/rtc-stm32.c:514:35: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
for (pred_a = pred_a_max; pred_a >= 0; pred_a-- ) {
drivers/rtc/rtc-stm32.c:530:44: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
(rate - ((pred_a + 1) * (pred_s + 1)) < 0) ?
Fixes:
4e64350f42e2 ("rtc: add STM32 RTC driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Amelie Delaunay [Mon, 16 Jan 2017 08:57:38 +0000 (09:57 +0100)]
rtc: stm32: use 0 instead of ~PWR_CR_DBP in regmap_update_bits
Using the ~ operator on a BIT() constant results in a large 'unsigned long'
constant that won't fit into an 'unsigned int' function argument on 64-bit
architectures, resulting in a harmless build warning in x86 allmodconfig:
drivers/rtc/rtc-stm32.c: In function 'stm32_rtc_probe':
drivers/rtc/rtc-stm32.c:651:51: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
regmap_update_bits(rtc->dbp, PWR_CR, PWR_CR_DBP, ~PWR_CR_DBP);
As PWR_CR_DBP mask prevents other bits to be cleared, replace all
~PWR_CR_DBP by 0.
Fixes:
4e64350f42e2 ("rtc: add STM32 RTC driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Thierry Reding [Thu, 12 Jan 2017 16:07:43 +0000 (17:07 +0100)]
rtc: tegra: Implement clock handling
Accessing the registers of the RTC block on Tegra requires the module
clock to be enabled. This only works because the RTC module clock will
be enabled by default during early boot. However, because the clock is
unused, the CCF will disable it at late_init time. This causes the RTC
to become unusable afterwards. This can easily be reproduced by trying
to use the RTC:
$ hwclock --rtc /dev/rtc1
This will hang the system. I ran into this by following up on a report
by Martin Michlmayr that reboot wasn't working on Tegra210 systems. It
turns out that the rtc-tegra driver's ->shutdown() implementation will
hang the CPU, because of the disabled clock, before the system can be
rebooted.
What confused me for a while is that the same driver is used on prior
Tegra generations where the hang can not be observed. However, as Peter
De Schrijver pointed out, this is because on 32-bit Tegra chips the RTC
clock is enabled by the tegra20_timer.c clocksource driver, which uses
the RTC to provide a persistent clock. This code is never enabled on
64-bit Tegra because the persistent clock infrastructure does not exist
on 64-bit ARM.
The proper fix for this is to add proper clock handling to the RTC
driver in order to ensure that the clock is enabled when the driver
requires it. All device trees contain the clock already, therefore
no additional changes are required.
Reported-by: Martin Michlmayr <tbm@cyrius.com>
Acked-By Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Thierry Reding [Thu, 12 Jan 2017 16:07:42 +0000 (17:07 +0100)]
rtc: tegra: Sort includes alphabetically
The ordering of includes is currently completely arbitrary, making it
impossible to decide where to put new includes. Remove the dilemma by
sort the include list alphabetically.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Arnd Bergmann [Fri, 13 Jan 2017 15:32:52 +0000 (16:32 +0100)]
rtc: stm32: fix building without CONFIG_OF
The new driver has a stray #ifdef in it that causes a build error:
drivers/rtc/rtc-stm32.c:718:21: error: 'stm32_rtc_of_match' undeclared here (not in a function); did you mean 'stm32_rtc_pm_ops'?
As the #ifdef serves no purpose here, let's just remove it.
Fixes:
4e64350f42e2 ("rtc: add STM32 RTC driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Arnd Bergmann [Fri, 13 Jan 2017 15:32:51 +0000 (16:32 +0100)]
rtc: stm32: remove __exit annotation on remove callback
The remove function can be called at runtime for a manual 'unbind'
operation and must not be left out from a built-in driver, as kbuild
complains:
`stm32_rtc_remove' referenced in section `.data.stm32_rtc_driver' of drivers/rtc/rtc-stm32.o: defined in discarded section `.exit.text' of drivers/rtc/rtc-stm32.o
This removes the extraneous annotation.
Fixes:
4e64350f42e2 ("rtc: add STM32 RTC driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Amelie Delaunay [Wed, 11 Jan 2017 13:46:43 +0000 (14:46 +0100)]
rtc: add STM32 RTC driver
This patch adds support for the STM32 RTC.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Amelie Delaunay [Thu, 5 Jan 2017 13:43:23 +0000 (14:43 +0100)]
dt-bindings: document the STM32 RTC bindings
This patch adds documentation of device tree bindings for the STM32 RTC.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Russell King [Wed, 11 Jan 2017 10:16:58 +0000 (10:16 +0000)]
rtc: armada38x: make struct rtc_class_ops const
Armada38x wants to modify its rtc_class_ops to remove the interrupt
handling when there is no usable interrupt, but this means we leave
function pointers in writable memory.
Since rtc_class_ops is small, arrange to have two instances, one for
when we have interrupts, and one for when we have none, both marked
const. This allows the compiler to place them in read-only memory,
which is better than placing them in __ro_after_init.
Thanks to Bhumika Goyal <bhumirks@gmail.com> for pointing out that
the structure was writable and submitting a patch to add
__ro_after_init.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Bhumika Goyal [Thu, 5 Jan 2017 16:55:05 +0000 (22:25 +0530)]
rtc: constify rtc_class_ops structures
Declare rtc_class_ops structures as const as they are only passed
as an argument to the function devm_rtc_device_register. This argument
is of type const struct rtc_class_ops *, so rtc_class_ops structures
having this property can be declared const.
Done using Coccinelle:
@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct rtc_class_ops i@p = {...};
@ok1@
identifier r1.i;
position p;
@@
devm_rtc_device_register(...,&i@p,...)
@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p
@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct rtc_class_ops i;
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Martin Kaiser [Tue, 3 Jan 2017 18:51:25 +0000 (19:51 +0100)]
Documentation: dt: rtc-imxdi: security violation interrupt
Document the DryIce security violation interrupt.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Martin Kaiser [Tue, 3 Jan 2017 18:49:50 +0000 (19:49 +0100)]
rtc: imxdi: use the security violation interrupt
The DryIce chipset has a dedicated security violation interrupt that is
triggered for security violations (if configured to do so). According
to the publicly available imx258 reference manual, irq 56 is used for
this interrupt.
If an irq number is provided for the security violation interrupt,
install the same handler that we're already using for the "normal"
interrupt.
imxdi->irq is used only in the probe function, make it a local variable.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Emil Bartczak [Sun, 25 Dec 2016 22:07:43 +0000 (23:07 +0100)]
rtc: mcp795: add alarm support.
This patch adds alarm support. This allows to configure the chip
to generate an interrupt when the alarm matches current time value.
Alarm can be programmed up to one year in the future
and is accurate to the second.
Signed-off-by: Emil Bartczak <emilbart@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Emil Bartczak [Sun, 25 Dec 2016 22:07:42 +0000 (23:07 +0100)]
rtc: mcp795: Add support for weekday.
This patch adds support for saving/loading weekday value from the chip.
Signed-off-by: Emil Bartczak <emilbart@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Gregory CLEMENT [Wed, 21 Dec 2016 10:28:16 +0000 (11:28 +0100)]
rtc: armada38x: Follow the new recommendation for errata implementation
According to RES-
3124064:
The device supports CPU write and read access to the RTC time register.
However, due to this restriction, read and write from/to internal RTC
register may fail.
Workaround:
General setup:
1. Configure the RTC Mbus Bridge Timing Control register (offset 0x184A0)
to value 0xFD4D4FFF
Write RTC WRCLK Period to its maximum value (0x3FF)
Write RTC WRCLK setup to 0x29
Write RTC WRCLK High Time to 0x53 (default value)
Write RTC Read Output Delay to its maximum value (0x1F)
Mbus - Read All Byte Enable to 0x1 (default value)
2. Configure the RTC Test Configuration Register (offset 0xA381C) bit3
to '1' (Reserved, Marvell internal)
For any RTC register read operation:
1. Read the requested register 100 times.
2. Find the result that appears most frequently and use this result
as the correct value.
For any RTC register write operation:
1. Issue two dummy writes of 0x0 to the RTC Status register (offset
0xA3800).
2. Write the time to the RTC Time register (offset 0xA380C).
This patch is based on the work of Shaker Daibes
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Vesa Jääskeläinen [Fri, 23 Dec 2016 11:15:59 +0000 (13:15 +0200)]
rtc: tps65910: use 'unsigned int' instead of 'unsigned' in arguments
Fixes checkpatch.pl warning:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Vesa Jääskeläinen [Fri, 23 Dec 2016 11:15:58 +0000 (13:15 +0200)]
rtc: tps65910: Add RTC calibration support
Texas Instrument's TPS65910 has support for compensating RTC crystal
inaccuracies. When enabled every hour RTC counter value will be compensated
with two's complement value.
Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Fabien Lahoudere [Tue, 20 Dec 2016 08:42:44 +0000 (09:42 +0100)]
rtc: rx8010: change lock mechanism
Remove spinlock and use the "rtc->ops_lock" from RTC subsystem instead.
spin_lock_irqsave() is not needed here because we do not have hard IRQs.
This patch fixes the following issue:
root@GE004097290448 b850v3:~# hwclock --systohc
root@GE004097290448 b850v3:~# hwclock --systohc
root@GE004097290448 b850v3:~# hwclock --systohc
root@GE004097290448 b850v3:~# hwclock --systohc
root@GE004097290448 b850v3:~# hwclock --systohc
[ 82.108175] BUG: spinlock wrong CPU on CPU#0, hwclock/855
[ 82.113660] lock: 0xedb4899c, .magic:
dead4ead, .owner: hwclock/855, .owner_cpu: 1
[ 82.121329] CPU: 0 PID: 855 Comm: hwclock Not tainted
4.8.0-00042-g09d5410-dirty #20
[ 82.129078] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 82.135609] Backtrace:
[ 82.138090] [<
8010d378>] (dump_backtrace) from [<
8010d5c0>] (show_stack+0x20/0x24)
[ 82.145664] r7:
ec936000 r6:
600a0013 r5:
00000000 r4:
81031680
[ 82.151402] [<
8010d5a0>] (show_stack) from [<
80401518>] (dump_stack+0xb4/0xe8)
[ 82.158636] [<
80401464>] (dump_stack) from [<
8017b8b0>] (spin_dump+0x84/0xcc)
[ 82.165775] r10:
00000000 r9:
ec936000 r8:
81056090 r7:
600a0013 r6:
edb4899c r5:
edb4899c
[ 82.173691] r4:
e5033e00 r3:
00000000
[ 82.177308] [<
8017b82c>] (spin_dump) from [<
8017bcb0>] (do_raw_spin_unlock+0x108/0x130)
[ 82.185314] r5:
edb4899c r4:
edb4899c
[ 82.188938] [<
8017bba8>] (do_raw_spin_unlock) from [<
8094b93c>] (_raw_spin_unlock_irqrestore+0x34/0x54)
[ 82.198333] r5:
edb4899c r4:
600a0013
[ 82.201953] [<
8094b908>] (_raw_spin_unlock_irqrestore) from [<
8065b090>] (rx8010_set_time+0x14c/0x188)
[ 82.211261] r5:
00000020 r4:
edb48990
[ 82.214882] [<
8065af44>] (rx8010_set_time) from [<
80653fe4>] (rtc_set_time+0x70/0x104)
[ 82.222801] r7:
00000051 r6:
edb39da0 r5:
edb39c00 r4:
ec937e8c
[ 82.228535] [<
80653f74>] (rtc_set_time) from [<
80655774>] (rtc_dev_ioctl+0x3c4/0x674)
[ 82.236368] r7:
00000051 r6:
7ecf1b74 r5:
00000000 r4:
edb39c00
[ 82.242106] [<
806553b0>] (rtc_dev_ioctl) from [<
80284034>] (do_vfs_ioctl+0xa4/0xa6c)
[ 82.249851] r8:
00000003 r7:
80284a40 r6:
ed1e9c80 r5:
edb44e60 r4:
7ecf1b74
[ 82.256642] [<
80283f90>] (do_vfs_ioctl) from [<
80284a40>] (SyS_ioctl+0x44/0x6c)
[ 82.263953] r10:
00000000 r9:
ec936000 r8:
7ecf1b74 r7:
4024700a r6:
ed1e9c80 r5:
00000003
[ 82.271869] r4:
ed1e9c80
[ 82.274432] [<
802849fc>] (SyS_ioctl) from [<
80108520>] (ret_fast_syscall+0x0/0x1c)
[ 82.282005] r9:
ec936000 r8:
801086c4 r7:
00000036 r6:
00000000 r5:
00000003 r4:
0008e1bc
root@GE004097290448 b850v3:~#
Message from syslogd@GE004097290448 at Dec 3 11:17:08 ...
kernel:[ 82.108175] BUG: spinlock wrong CPU on CPU#0, hwclock/855
Message from syslogd@GE004097290448 at Dec 3 11:17:08 ...
kernel:[ 82.113660] lock: 0xedb4899c, .magic:
dead4ead, .owner: hwclock/855, .owner_cpu: 1
hwclock --systohc
root@GE004097290448 b850v3:~#
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Linus Torvalds [Mon, 26 Dec 2016 00:13:08 +0000 (16:13 -0800)]
Linux 4.10-rc1
Larry Finger [Fri, 23 Dec 2016 03:06:53 +0000 (21:06 -0600)]
powerpc: Fix build warning on 32-bit PPC
I am getting the following warning when I build kernel 4.9-git on my
PowerBook G4 with a 32-bit PPC processor:
AS arch/powerpc/kernel/misc_32.o
arch/powerpc/kernel/misc_32.S:299:7: warning: "CONFIG_FSL_BOOKE" is not defined [-Wundef]
This problem is evident after commit
989cea5c14be ("kbuild: prevent
lib-ksyms.o rebuilds"); however, this change in kbuild only exposes an
error that has been in the code since 2005 when this source file was
created. That was with commit
9994a33865f4 ("powerpc: Introduce
entry_{32,64}.S, misc_{32,64}.S, systbl.S").
The offending line does not make a lot of sense. This error does not
seem to cause any errors in the executable, thus I am not recommending
that it be applied to any stable versions.
Thanks to Nicholas Piggin for suggesting this solution.
Fixes:
9994a33865f4 ("powerpc: Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S")
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 25 Dec 2016 22:56:58 +0000 (14:56 -0800)]
avoid spurious "may be used uninitialized" warning
The timer type simplifications caused a new gcc warning:
drivers/base/power/domain.c: In function ‘genpd_runtime_suspend’:
drivers/base/power/domain.c:562:14: warning: ‘time_start’ may be used uninitialized in this function [-Wmaybe-uninitialized]
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
despite the actual use of "time_start" not having changed in any way.
It appears that simply changing the type of ktime_t from a union to a
plain scalar type made gcc check the use.
The variable wasn't actually used uninitialized, but gcc apparently
failed to notice that the conditional around the use was exactly the
same as the conditional around the initialization of that variable.
Add an unnecessary initialization just to shut up the compiler.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 25 Dec 2016 22:30:04 +0000 (14:30 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer type cleanups from Thomas Gleixner:
"This series does a tree wide cleanup of types related to
timers/timekeeping.
- Get rid of cycles_t and use a plain u64. The type is not really
helpful and caused more confusion than clarity
- Get rid of the ktime union. The union has become useless as we use
the scalar nanoseconds storage unconditionally now. The 32bit
timespec alike storage got removed due to the Y2038 limitations
some time ago.
That leaves the odd union access around for no reason. Clean it up.
Both changes have been done with coccinelle and a small amount of
manual mopping up"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
ktime: Get rid of ktime_equal()
ktime: Cleanup ktime_set() usage
ktime: Get rid of the union
clocksource: Use a plain u64 instead of cycle_t
Linus Torvalds [Sun, 25 Dec 2016 22:05:56 +0000 (14:05 -0800)]
Merge branch 'smp-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull SMP hotplug notifier removal from Thomas Gleixner:
"This is the final cleanup of the hotplug notifier infrastructure. The
series has been reintgrated in the last two days because there came a
new driver using the old infrastructure via the SCSI tree.
Summary:
- convert the last leftover drivers utilizing notifiers
- fixup for a completely broken hotplug user
- prevent setup of already used states
- removal of the notifiers
- treewide cleanup of hotplug state names
- consolidation of state space
There is a sphinx based documentation pending, but that needs review
from the documentation folks"
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/armada-xp: Consolidate hotplug state space
irqchip/gic: Consolidate hotplug state space
coresight/etm3/4x: Consolidate hotplug state space
cpu/hotplug: Cleanup state names
cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
staging/lustre/libcfs: Convert to hotplug state machine
scsi/bnx2i: Convert to hotplug state machine
scsi/bnx2fc: Convert to hotplug state machine
cpu/hotplug: Prevent overwriting of callbacks
x86/msr: Remove bogus cleanup from the error path
bus: arm-ccn: Prevent hotplug callback leak
perf/x86/intel/cstate: Prevent hotplug callback leak
ARM/imx/mmcd: Fix broken cpu hotplug handling
scsi: qedi: Convert to hotplug state machine
Linus Torvalds [Sun, 25 Dec 2016 22:01:28 +0000 (14:01 -0800)]
Merge branch 'turbostat' of git://git./linux/kernel/git/lenb/linux
Pull turbostat updates from Len Brown.
* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: remove obsolete -M, -m, -C, -c options
tools/power turbostat: Make extensible via the --add parameter
tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHz
tools/power turbostat: line up headers when -M is used
tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decoding
tools/power turbostat: Support Knights Mill (KNM)
tools/power turbostat: Display HWP OOB status
tools/power turbostat: fix Denverton BCLK
tools/power turbostat: use intel-family.h model strings
tools/power/turbostat: Add Denverton RAPL support
tools/power/turbostat: Add Denverton support
tools/power/turbostat: split core MSR support into status + limit
tools/power turbostat: fix error case overflow read of slm_freq_table[]
tools/power turbostat: Allocate correct amount of fd and irq entries
tools/power turbostat: switch to tab delimited output
tools/power turbostat: Gracefully handle ACPI S3
tools/power turbostat: tidy up output on Joule counter overflow
Nicholas Piggin [Sun, 25 Dec 2016 03:00:30 +0000 (13:00 +1000)]
mm: add PageWaiters indicating tasks are waiting for a page bit
Add a new page flag, PageWaiters, to indicate the page waitqueue has
tasks waiting. This can be tested rather than testing waitqueue_active
which requires another cacheline load.
This bit is always set when the page has tasks on page_waitqueue(page),
and is set and cleared under the waitqueue lock. It may be set when
there are no tasks on the waitqueue, which will cause a harmless extra
wakeup check that will clears the bit.
The generic bit-waitqueue infrastructure is no longer used for pages.
Instead, waitqueues are used directly with a custom key type. The
generic code was not flexible enough to have PageWaiters manipulation
under the waitqueue lock (which simplifies concurrency).
This improves the performance of page lock intensive microbenchmarks by
2-3%.
Putting two bits in the same word opens the opportunity to remove the
memory barrier between clearing the lock bit and testing the waiters
bit, after some work on the arch primitives (e.g., ensuring memory
operand widths match and cover both bits).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nicholas Piggin [Sun, 25 Dec 2016 03:00:29 +0000 (13:00 +1000)]
mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked
A page is not added to the swap cache without being swap backed,
so PageSwapBacked mappings can use PG_owner_priv_1 for PageSwapCache.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Thomas Gleixner [Sun, 25 Dec 2016 11:43:07 +0000 (12:43 +0100)]
ktime: Get rid of ktime_equal()
No point in going through loops and hoops instead of just comparing the
values.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Thomas Gleixner [Sun, 25 Dec 2016 11:30:41 +0000 (12:30 +0100)]
ktime: Cleanup ktime_set() usage
ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Thomas Gleixner [Sun, 25 Dec 2016 10:38:40 +0000 (11:38 +0100)]
ktime: Get rid of the union
ktime is a union because the initial implementation stored the time in
scalar nanoseconds on 64 bit machine and in a endianess optimized timespec
variant for 32bit machines. The Y2038 cleanup removed the timespec variant
and switched everything to scalar nanoseconds. The union remained, but
become completely pointless.
Get rid of the union and just keep ktime_t as simple typedef of type s64.
The conversion was done with coccinelle and some manual mopping up.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Thomas Gleixner [Wed, 21 Dec 2016 19:32:01 +0000 (20:32 +0100)]
clocksource: Use a plain u64 instead of cycle_t
There is no point in having an extra type for extra confusion. u64 is
unambiguous.
Conversion was done with the following coccinelle script:
@rem@
@@
-typedef u64 cycle_t;
@fix@
typedef cycle_t;
@@
-cycle_t
+u64
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:57 +0000 (20:19 +0100)]
irqchip/armada-xp: Consolidate hotplug state space
The mpic is either the main interrupt controller or is cascaded behind a
GIC. The mpic is single instance and the modes are mutually exclusive, so
there is no reason to have seperate cpu hotplug states.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/20161221192112.333161745@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:56 +0000 (20:19 +0100)]
irqchip/gic: Consolidate hotplug state space
Even if both drivers are compiled in only one instance can run on a given
system depending on the available GIC version.
So having seperate hotplug states for them is pointless.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192112.252416267@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:55 +0000 (20:19 +0100)]
coresight/etm3/4x: Consolidate hotplug state space
Even if both drivers are compiled in only one instance can run on a given
system depending on the available tracer cell.
So having seperate hotplug states for them is pointless.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: http://lkml.kernel.org/r/20161221192112.162765484@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:54 +0000 (20:19 +0100)]
cpu/hotplug: Cleanup state names
When the state names got added a script was used to add the extra argument
to the calls. The script basically converted the state constant to a
string, but the cleanup to convert these strings into meaningful ones did
not happen.
Replace all the useless strings with 'subsys/xxx/yyy:state' strings which
are used in all the other places already.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:53 +0000 (20:19 +0100)]
cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
hotcpu_notifier(), cpu_notifier(), __hotcpu_notifier(), __cpu_notifier(),
register_hotcpu_notifier(), register_cpu_notifier(),
__register_hotcpu_notifier(), __register_cpu_notifier(),
unregister_hotcpu_notifier(), unregister_cpu_notifier(),
__unregister_hotcpu_notifier(), __unregister_cpu_notifier()
are unused now. Remove them and all related code.
Remove also the now pointless cpu notifier error injection mechanism. The
states can be executed step by step and error rollback is the same as cpu
down, so any state transition can be tested w/o requiring the notifier
error injection.
Some CPU hotplug states are kept as they are (ab)used for hotplug state
tracking.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161221192112.005642358@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Anna-Maria Gleixner [Wed, 21 Dec 2016 19:19:52 +0000 (20:19 +0100)]
staging/lustre/libcfs: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: devel@driverdev.osuosl.org
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: rt@linutronix.de
Cc: lustre-devel@lists.lustre.org
Link: http://lkml.kernel.org/r/20161202110027.htzzeervzkoc4muv@linutronix.de
Link: http://lkml.kernel.org/r/20161221192111.922872524@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sebastian Andrzej Siewior [Wed, 21 Dec 2016 19:19:51 +0000 (20:19 +0100)]
scsi/bnx2i: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.
This is the minimal fixup so we can remove the hotplug notifier mess
completely.
The real rework of this driver to use work queues is still stuck in
review/testing on the SCSI mailing list.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: QLogic-Storage-Upstream@qlogic.com
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20161221192111.836895753@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sebastian Andrzej Siewior [Wed, 21 Dec 2016 19:19:50 +0000 (20:19 +0100)]
scsi/bnx2fc: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.
This is the minimal fixup so we can remove the hotplug notifier mess
completely.
The real rework of this driver to use work queues is still stuck in
review/testing on the SCSI mailing list.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: QLogic-Storage-Upstream@qlogic.com
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20161221192111.757309869@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Wed, 21 Dec 2016 19:19:49 +0000 (20:19 +0100)]
cpu/hotplug: Prevent overwriting of callbacks
Developers manage to overwrite states blindly without thought. That's fatal
and hard to debug. Add sanity checks to make it fail.
This requries to restructure the code so that the dynamic state allocation
happens in the same lock protected section as the actual store. Otherwise
the previous assignment of 'Reserved' to the name field would trigger the
overwrite check.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192111.675234535@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Thu, 22 Dec 2016 09:32:38 +0000 (10:32 +0100)]
x86/msr: Remove bogus cleanup from the error path
The error cleanup which is invoked when the hotplug state setup failed
tries to remove the failed state, which is broken.
Fixes:
8fba38c937cd ("x86/msr: Convert to hotplug state machine")
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Thomas Gleixner [Thu, 22 Dec 2016 10:14:06 +0000 (11:14 +0100)]
bus: arm-ccn: Prevent hotplug callback leak
In case the driver registration fails, the hotplug callback is leaked.
Not fatal, because it's never invoked as there are no instances registered,
but wrong nevertheless.
Fixes:
fdc15a36d84e ("bus/arm-ccn: Convert to hotplug statemachine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Thomas Gleixner [Thu, 22 Dec 2016 10:02:08 +0000 (11:02 +0100)]
perf/x86/intel/cstate: Prevent hotplug callback leak
If the pmu registration fails the registered hotplug callbacks are not
removed. Wrong in any case, but fatal in case of a modular driver.
Replace the nonsensical state names with proper ones while at it.
Fixes:
77c34ef1c319 ("perf/x86/intel/cstate: Convert Intel CSTATE to hotplug state machine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Thomas Gleixner [Wed, 21 Dec 2016 19:19:48 +0000 (20:19 +0100)]
ARM/imx/mmcd: Fix broken cpu hotplug handling
The cpu hotplug support of this perf driver is broken in several ways:
1) It adds a instance before setting up the state.
2) The state for the instance is different from the state of the
callback. It's just a randomly chosen state.
3) The instance registration is not error checked so nobody noticed that
the call can never succeed.
4) The state for the multi install callbacks is chosen randomly and
overwrites existing state. This is now prevented by the core code so the
call is guaranteed to fail.
5) The error exit path in the init function leaves the instance registered
and then frees the memory which contains the enqueued hlist node.
6) The remove function is removing the state and not the instance.
Fix it by:
- Setting up the state before adding instances. Use a dynamically allocated
state for it.
- Installing instances after the state has been set up
- Removing the instance in the error path before freeing memory
- Removing the instance not the state in the driver remove callback
While at is use raw_cpu_processor_id(), because cpu_processor_id() cannot
be used in preemptible context, and set the driver data after successful
registration of the pmu.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Frank Li <frank.li@nxp.com>
Cc: Zhengyu Shen <zhengyu.shen@nxp.com>
Link: http://lkml.kernel.org/r/20161221192111.596204211@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Sat, 24 Dec 2016 11:34:02 +0000 (12:34 +0100)]
scsi: qedi: Convert to hotplug state machine
The CPU hotplug code is a trainwreck. It leaks a notifier in case of driver
registration error and the per cpu loop is racy against cpu hotplug. Aside
of that the driver should have been written and merged with the new state
machine interfaces in the first place.
Mop up the mess and Convert it to the hotplug state machine.
Signed-off-by: Thomas Grumpy Gleixner <tglx@linutronix.de>
Cc: Nilesh Javali <nilesh.javali@cavium.com>
Cc: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Cc: Chad Dupuis <chad.dupuis@cavium.com>
Cc: Saurav Kashyap <saurav.kashyap@cavium.com>
Cc: Arun Easi <arun.easi@cavium.com>
Cc: Manish Rangankar <manish.rangankar@cavium.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Len Brown [Sat, 24 Dec 2016 20:18:37 +0000 (15:18 -0500)]
tools/power turbostat: remove obsolete -M, -m, -C, -c options
The new --add option has replaced the -M, -m, -C, -c options
Eg.
-M 0x10 is now --add msr0x10,raw
-m 0x10 is now --add msr0x10,raw,u32
-C 0x10 is now --add msr0x10,delta
-c 0x10 is now --add msr0x10,delta,u32
The --add option can be repeated to add any number of counters,
while the previous options were limited to adding one of each type.
In addition, the --add option can accept a column label,
and can also display a counter as a percentage of elapsed cycles.
Eg. --add msr0x3fe,core,percent,MY_CC3
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Fri, 23 Dec 2016 04:57:55 +0000 (23:57 -0500)]
tools/power turbostat: Make extensible via the --add parameter
Create the "--add" parameter. This can be used to teach an existing
turbostat binary about any number of any type of counter.
turbostat(8) details the syntax for --add.
Signed-off-by: Len Brown <len.brown@intel.com>
Linus Torvalds [Sat, 24 Dec 2016 19:46:01 +0000 (11:46 -0800)]
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)
to do the replacement at the end of the merge window.
Requested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 24 Dec 2016 19:37:18 +0000 (11:37 -0800)]
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"This ncludes various cifs/smb3 bug fixes, mostly for stable as well.
In the next week I expect that Germano will have some reconnection
fixes, and also I expect to have the remaining pieces of the snapshot
enablement and SMB3 ACLs, but wanted to get this set of bug fixes in"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
cifs_get_root shouldn't use path with tree name
Fix default behaviour for empty domains and add domainauto option
cifs: use %16phN for formatting md5 sum
cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack
CIFS: Fix a possible double locking of mutex during reconnect
CIFS: Fix a possible memory corruption during reconnect
CIFS: Fix a possible memory corruption in push locks
CIFS: Fix missing nls unload in smb2_reconnect()
CIFS: Decrease verbosity of ioctl call
SMB3: parsing for new snapshot timestamp mount parm
Linus Torvalds [Sat, 24 Dec 2016 19:27:45 +0000 (11:27 -0800)]
Merge tag 'watchdog-for-linus-v4.10' of git://git./linux/kernel/git/groeck/linux-staging
Pull watchdog updates from Wim Van Sebroeck and Guenter Roeck:
- new driver for Add Loongson1 SoC
- minor cleanup and fixes in various drivers
* tag 'watchdog-for-linus-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
watchdog: it87_wdt: add IT8620E ID
watchdog: mpc8xxx: Remove unneeded linux/miscdevice.h include
watchdog: octeon: Remove unneeded linux/miscdevice.h include
watchdog: bcm2835_wdt: set WDOG_HW_RUNNING bit when appropriate
watchdog: loongson1: Add Loongson1 SoC watchdog driver
watchdog: cpwd: remove memory allocate failure message
watchdog: da9062/61: watchdog driver
intel-mid_wdt: Error code is just an integer
intel-mid_wdt: make sure watchdog is not running at startup
watchdog: mei_wdt: request stop on reboot to prevent false positive event
watchdog: hpwdt: changed maintainer information
watchdog: jz4740: Fix modular build
watchdog: qcom: fix kernel panic due to external abort on non-linefetch
watchdog: davinci: add support for deferred probing
watchdog: meson: Remove unneeded platform MODULE_ALIAS
watchdog: Standardize leading tabs and spaces in Kconfig file
watchdog: max77620_wdt: fix module autoload
watchdog: bcm7038_wdt: fix module autoload
Linus Torvalds [Sat, 24 Dec 2016 19:23:24 +0000 (11:23 -0800)]
Merge tag 'ntb-4.10' of git://github.com/jonmason/ntb
Pull NTB update from Jon Mason:
- NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
and correcting a free_irq inconsistency
- add Intel SKX support
- change the AMD NTB maintainer, and fix some bugs present there
* tag 'ntb-4.10' of git://github.com/jonmason/ntb:
ntb_transport: Remove unnecessary call to ntb_peer_spad_read
NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
ntb: fix SKX NTB config space size register offsets
NTB: correct ntb_peer_spad_read for case when callback is not supplied.
MAINTAINERS: Change in maintainer for AMD NTB
ntb_transport: Limit memory windows based on available, scratchpads
NTB: Register and offset values fix for memory window
NTB: add support for hotplug feature
ntb: Adding Skylake Xeon NTB support
Linus Torvalds [Sat, 24 Dec 2016 00:54:46 +0000 (16:54 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"There's a number of fixes:
- a round of fixes for CPUID-less legacy CPUs
- a number of microcode loader fixes
- i8042 detection robustization fixes
- stack dump/unwinder fixes
- x86 SoC platform driver fixes
- a GCC 7 warning fix
- virtualization related fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
Revert "x86/unwind: Detect bad stack return address"
x86/paravirt: Mark unused patch_default label
x86/microcode/AMD: Reload proper initrd start address
x86/platform/intel/quark: Add printf attribute to imr_self_test_result()
x86/platform/intel-mid: Switch MPU3050 driver to IIO
x86/alternatives: Do not use sync_core() to serialize I$
x86/topology: Document cpu_llc_id
x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
x86/asm: Rewrite sync_core() to use IRET-to-self
x86/microcode/intel: Replace sync_core() with native_cpuid()
Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"
x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
x86/cpu: Probe CPUID leaf 6 even when cpuid_level == 6
x86/tools: Fix gcc-7 warning in relocs.c
x86/unwind: Dump stack data on warnings
x86/unwind: Adjust last frame check for aligned function stacks
x86/init: Fix a couple of comment typos
x86/init: Remove i8042_detect() from platform ops
Input: i8042 - Trust firmware a bit more when probing on X86
x86/init: Add i8042 state to the platform data
...
Linus Torvalds [Sat, 24 Dec 2016 00:51:16 +0000 (16:51 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fix from Ingo Molnar:
"ARM/MOXA SoC clocksource driver fixes"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/moxart: Plug memory and mapping leaks
Linus Torvalds [Sat, 24 Dec 2016 00:49:12 +0000 (16:49 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"On the kernel side there's two x86 PMU driver fixes and a uprobes fix,
plus on the tooling side there's a number of fixes and some late
updates"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
perf sched timehist: Fix invalid period calculation
perf sched timehist: Remove hardcoded 'comm_width' check at print_summary
perf sched timehist: Enlarge default 'comm_width'
perf sched timehist: Honour 'comm_width' when aligning the headers
perf/x86: Fix overlap counter scheduling bug
perf/x86/pebs: Fix handling of PEBS buffer overflows
samples/bpf: Move open_raw_sock to separate header
samples/bpf: Remove perf_event_open() declaration
samples/bpf: Be consistent with bpf_load_program bpf_insn parameter
tools lib bpf: Add bpf_prog_{attach,detach}
samples/bpf: Switch over to libbpf
perf diff: Do not overwrite valid build id
perf annotate: Don't throw error for zero length symbols
perf bench futex: Fix lock-pi help string
perf trace: Check if MAP_32BIT is defined (again)
samples/bpf: Make perf_event_read() static
uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation
samples/bpf: Make samples more libbpf-centric
tools lib bpf: Add flags to bpf_create_map()
tools lib bpf: use __u32 from linux/types.h
...
Linus Torvalds [Sat, 24 Dec 2016 00:47:25 +0000 (16:47 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
"A build warning fix with certain .config's"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/st: Mark st_irq_syscfg_resume() __maybe_unused
Steve Wahl [Wed, 21 Dec 2016 16:45:22 +0000 (11:45 -0500)]
ntb_transport: Remove unnecessary call to ntb_peer_spad_read
The results were previously ignored, anyway.
Signed-off-by: Steve Wahl <Steve.Wahl@dell.com>
Fixes:
e26a5843f7f5014ae4460030ca4de029a3ac35d3
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Christophe JAILLET [Mon, 19 Dec 2016 05:52:55 +0000 (06:52 +0100)]
NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
'request_irq()' and 'free_irq()' should have the same 'dev_id'.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Dave Jiang [Tue, 13 Dec 2016 16:03:13 +0000 (09:03 -0700)]
ntb: fix SKX NTB config space size register offsets
The offsets for the SZ registers are wrong. Updated.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reported-by: Sandeep Mann <sandeep@purestorage.com>
Tested-by: Zachary Ross <zacharyx.ross@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Steven Wahl [Thu, 8 Dec 2016 17:02:28 +0000 (17:02 +0000)]
NTB: correct ntb_peer_spad_read for case when callback is not supplied.
Correct ntb_peer_spad_read for case when callback is not supplied
Signed-off-by: Steve Wahl <Steve.Wahl@dell.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Shyam Sundar S K [Wed, 7 Dec 2016 17:18:39 +0000 (22:48 +0530)]
MAINTAINERS: Change in maintainer for AMD NTB
I would like to take maintainership for AMD NTB
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Acked-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Shyam Sundar S K [Wed, 7 Dec 2016 17:07:05 +0000 (22:37 +0530)]
ntb_transport: Limit memory windows based on available, scratchpads
When the underlying NTB H/W driver advertises more memory windows
than the number of scratchpads available to setup MW's, it is likely
that we may end up filling the remaining memory windows with garbage.
So to avoid that, lets limit the memory windows that transport driver
can setup based on the available scratchpads.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Shyam Sundar S K [Thu, 1 Dec 2016 19:14:28 +0000 (00:44 +0530)]
NTB: Register and offset values fix for memory window
Due to incorrect limit and translation register values, NTB link was
going down when the memory window was setup. Made appropriate changes
as per spec.
Fix limit register values for BAR1, which was overlapping
with the BAR23 address.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Xiangliang Yu [Fri, 18 Nov 2016 09:21:41 +0000 (14:51 +0530)]
NTB: add support for hotplug feature
AMD NTB support hotplug under B2B mode. NTB will trigger link
up/down interrupt event when doing plug add/remove, this patch
implements the two interrupt event to support B2B hotplug function.
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Dave Jiang [Wed, 16 Nov 2016 21:03:38 +0000 (14:03 -0700)]
ntb: Adding Skylake Xeon NTB support
The Skylake Xeon NTB hardware has made some changes to the register name,
offset, and the way doorbells work. Adding driver support for the new
hardware.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Josh Poimboeuf [Thu, 22 Dec 2016 15:02:49 +0000 (09:02 -0600)]
Revert "x86/unwind: Detect bad stack return address"
Revert the following commit:
b6959a362177 ("x86/unwind: Detect bad stack return address")
... because Andrey Konovalov reported an unwinder warning:
WARNING: unrecognized kernel stack return address
ffffffffa0000001 at
ffff88006377fa18 in a.out:4467
The unwind was initiated from an interrupt which occurred while running in the
generated code for a kprobe. The unwinder printed the warning because it
expected regs->ip to point to a valid text address, but instead it pointed to
the generated code.
Eventually we may want come up with a way to identify generated kprobe
code so the unwinder can know that it's a valid return address. Until
then, just remove the warning.
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/02f296848fbf49fb72dfeea706413ecbd9d4caf6.1482418739.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Fri, 23 Dec 2016 19:23:29 +0000 (20:23 +0100)]
Merge tag 'perf-urgent-for-mingo-
20161222' of git://git./linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
Fixes for 'perf sched timehist': (Namhyung Kim)
- Define a larger initial alignment value for the COMM column and
make it be more consistently honoured, for instance in the header.
- Fix invalid period calculation when using the --time option to
select a time slice, when events outside that slice were being
considered for the per cpu idle stats summary.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Fri, 23 Dec 2016 19:23:25 +0000 (11:23 -0800)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) We have to be careful to not try and place a checksum after the end
of a rawv6 packet, fix from Dave Jones with help from Hannes
Frederic Sowa.
2) Missing memory barriers in tcp_tasklet_func() lead to crashes, from
Eric Dumazet.
3) Several bug fixes for the new XDP support in virtio_net, from Jason
Wang.
4) Increase headroom in RX skbs in be2net driver to accomodate
encapsulations such as geneve. From Kalesh A P.
5) Fix SKB frag unmapping on TX in mvpp2, from Thomas Petazzoni.
6) Pre-pulling UDP headers created a regression in RECVORIGDSTADDR
socket option support, from Willem de Bruijn.
7) UID based routing added a potential OOPS in ip_do_redirect() when we
see an SKB without a socket attached. We just need it for the
network namespace which we can get from skb->dev instead. Fix from
Lorenzo Colitti.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (30 commits)
sctp: fix recovering from 0 win with small data chunks
sctp: do not loose window information if in rwnd_over
virtio-net: XDP support for small buffers
virtio-net: remove big packet XDP codes
virtio-net: forbid XDP when VIRTIO_NET_F_GUEST_UFO is support
virtio-net: make rx buf size estimation works for XDP
virtio-net: unbreak csumed packets for XDP_PASS
virtio-net: correctly handle XDP_PASS for linearized packets
virtio-net: fix page miscount during XDP linearizing
virtio-net: correctly xmit linearized page on XDP_TX
virtio-net: remove the warning before XDP linearizing
mlxsw: spectrum_router: Correctly remove nexthop groups
mlxsw: spectrum_router: Don't reflect dead neighs
neigh: Send netevent after marking neigh as dead
ipv6: handle -EFAULT from skb_copy_bits
inet: fix IP(V6)_RECVORIGDSTADDR for udp sockets
net/sched: cls_flower: Mandate mask when matching on flags
net/sched: act_tunnel_key: Fix setting UDP dst port in metadata under IPv6
stmmac: CSR clock configuration fix
net: ipv4: Don't crash if passing a null sk to ip_do_redirect.
...
Marcelo Ricardo Leitner [Fri, 23 Dec 2016 16:29:37 +0000 (14:29 -0200)]
sctp: fix recovering from 0 win with small data chunks
Currently if SCTP closes the receive window with window pressure, mostly
caused by excessive skb overhead on payload/overheads ratio, SCTP will
close the window abruptly while saving the delta on rwnd_press. It will
start recovering rwnd as the chunks are consumed by the application and
the rwnd_press will be only recovered after rwnd reach the same value as
of rwnd_press, mostly to prevent silly window syndrome.
Thing is, this is very inefficient with small data chunks, as with those
it will never reach back that value, and thus it will never recover from
such pressure. This means that we will not issue window updates when
recovering from 0 window and will rely on a sender retransmit to notice
it.
The fix here is to remove such threshold, as no value is good enough: it
depends on the (avg) chunk sizes being used.
Test with netperf -t SCTP_STREAM -- -m 1, and trigger 0 window by
sending SIGSTOP to netserver, sleep 1.2, and SIGCONT.
Rate limited to 845kbps, for visibility. Capture done at netserver side.
Previously:
01.500751 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632372996] [a_rwnd 99153] [
01.500752 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632372997] [SID: 0] [SS
01.517471 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373010] [SID: 0] [SS
01.517483 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373009] [a_rwnd 0] [#gap
01.517485 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373083] [SID: 0] [SS
01.517488 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373009] [a_rwnd 0] [#gap
01.534168 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373096] [SID: 0] [SS
01.534180 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373009] [a_rwnd 0] [#gap
01.534181 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373169] [SID: 0] [SS
01.534185 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373009] [a_rwnd 0] [#gap
02.525978 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373010] [SID: 0] [SS
02.526021 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373009] [a_rwnd 0] [#gap
(window update missed)
04.573807 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373010] [SID: 0] [SS
04.779370 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373082] [a_rwnd 859] [#g
04.789162 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373083] [SID: 0] [SS
04.789323 IP A.36925 > B.48277: sctp (1) [DATA] (B)(E) [TSN:
632373156] [SID: 0] [SS
04.789372 IP B.48277 > A.36925: sctp (1) [SACK] [cum ack
632373228] [a_rwnd 786] [#g
After:
02.568957 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098728] [a_rwnd 99153]
02.568961 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098729] [SID: 0] [S
02.585631 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098742] [SID: 0] [S
02.585666 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 0] [#ga
02.585671 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098815] [SID: 0] [S
02.585683 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 0] [#ga
02.602330 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098828] [SID: 0] [S
02.602359 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 0] [#ga
02.602363 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098901] [SID: 0] [S
02.602372 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 0] [#ga
03.600788 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098742] [SID: 0] [S
03.600830 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 0] [#ga
03.619455 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 13508]
03.619479 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 27017]
03.619497 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 40526]
03.619516 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 54035]
03.619533 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 67544]
03.619552 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 81053]
03.619570 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098741] [a_rwnd 94562]
(following data transmission triggered by window updates above)
03.633504 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098742] [SID: 0] [S
03.836445 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098814] [a_rwnd 100000]
03.843125 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098815] [SID: 0] [S
03.843285 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098888] [SID: 0] [S
03.843345 IP B.50536 > A.55173: sctp (1) [SACK] [cum ack
2490098960] [a_rwnd 99894]
03.856546 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490098961] [SID: 0] [S
03.866450 IP A.55173 > B.50536: sctp (1) [DATA] (B)(E) [TSN:
2490099011] [SID: 0] [S
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Marcelo Ricardo Leitner [Fri, 23 Dec 2016 16:29:02 +0000 (14:29 -0200)]
sctp: do not loose window information if in rwnd_over
It's possible that we receive a packet that is larger than current
window. If it's the first packet in this way, it will cause it to
increase rwnd_over. Then, if we receive another data chunk (specially as
SCTP allows you to have one data chunk in flight even during 0 window),
rwnd_over will be overwritten instead of added to.
In the long run, this could cause the window to grow bigger than its
initial size, as rwnd_over would be charged only for the last received
data chunk while the code will try open the window for all packets that
were received and had its value in rwnd_over overwritten. This, then,
can lead to the worsening of payload/buffer ratio and cause rwnd_press
to kick in more often.
The fix is to sum it too, same as is done for rwnd_press, so that if we
receive 3 chunks after closing the window, we still have to release that
same amount before re-opening it.
Log snippet from sctp_test exhibiting the issue:
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:
ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:
ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:
ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:
ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:
ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
[ 146.209232] sctp: sctp_assoc_rwnd_decrease:
association:
ffff88013928e000 has asoc->rwnd:0, asoc->rwnd_over:1!
[ 146.209232] sctp: sctp_assoc_rwnd_decrease: asoc:
ffff88013928e000
rwnd decreased by 1 to (0, 1, 114221)
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Fri, 23 Dec 2016 18:52:43 +0000 (10:52 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull final vfs updates from Al Viro:
"Assorted cleanups and fixes all over the place"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
ufs: fix function declaration for ufs_truncate_blocks
fs: exec: apply CLOEXEC before changing dumpable task flags
seq_file: reset iterator to first record for zero offset
vfs: fix isize/pos/len checks for reflink & dedupe
[iov_iter] fix iterate_all_kinds() on empty iterators
move aio compat to fs/aio.c
reorganize do_make_slave()
clone_private_mount() doesn't need to touch namespace_sem
remove a bogus claim about namespace_sem being held by callers of mnt_alloc_id()
David S. Miller [Fri, 23 Dec 2016 18:48:56 +0000 (13:48 -0500)]
Merge branch 'virtio-net-xdp-fixes'
Jason Wang says:
====================
several fixups for virtio-net XDP
Merry Xmas and a Happy New year to all:
This series tries to fixes several issues for virtio-net XDP which
could be categorized into several parts:
- fix several issues during XDP linearizing
- allow csumed packet to work for XDP_PASS
- make EWMA rxbuf size estimation works for XDP
- forbid XDP when GUEST_UFO is support
- remove big packet XDP support
- add XDP support or small buffer
Please see individual patches for details.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 23 Dec 2016 14:37:32 +0000 (22:37 +0800)]
virtio-net: XDP support for small buffers
Commit
f600b6905015 ("virtio_net: Add XDP support") leaves the case of
small receive buffer untouched. This will confuse the user who want to
set XDP but use small buffers. Other than forbid XDP in small buffer
mode, let's make it work. XDP then can only work at skb->data since
virtio-net create skbs during refill, this is sub optimal which could
be optimized in the future.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 23 Dec 2016 14:37:31 +0000 (22:37 +0800)]
virtio-net: remove big packet XDP codes
Now we in fact don't allow XDP for big packets, remove its codes.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 23 Dec 2016 14:37:30 +0000 (22:37 +0800)]
virtio-net: forbid XDP when VIRTIO_NET_F_GUEST_UFO is support
When VIRTIO_NET_F_GUEST_UFO is negotiated, host could still send UFO
packet that exceeds a single page which could not be handled
correctly by XDP. So this patch forbids setting XDP when GUEST_UFO is
supported. While at it, forbid XDP for ECN (which comes only from GRO)
too to prevent user from misconfiguration.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 23 Dec 2016 14:37:29 +0000 (22:37 +0800)]
virtio-net: make rx buf size estimation works for XDP
We don't update ewma rx buf size in the case of XDP. This will lead
underestimation of rx buf size which causes host to produce more than
one buffers. This will greatly increase the possibility of XDP page
linearization.
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>