GitHub/moto-9609/android_kernel_motorola_exynos9610.git
7 years agommc: meson-gx: improve response reading
Heiner Kallweit [Wed, 22 Mar 2017 21:33:50 +0000 (22:33 +0100)]
mmc: meson-gx: improve response reading

Response reading can be slightly improved by doing it in just one place.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
7 years agommc: meson-gx: improve variable usage in meson_mmc_start_cmd
Heiner Kallweit [Wed, 22 Mar 2017 21:33:47 +0000 (22:33 +0100)]
mmc: meson-gx: improve variable usage in meson_mmc_start_cmd

Simplify the code by using two variables instead of a struct sd_emmc_desc.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
7 years agommc: meson-gx: replace cmd->data in meson_mmc_start_cmd
Heiner Kallweit [Wed, 22 Mar 2017 21:33:44 +0000 (22:33 +0100)]
mmc: meson-gx: replace cmd->data in meson_mmc_start_cmd

Replace cmd->data with a local variable to simplify code a little.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
7 years agommc: meson-gx: remove unneeded configuration bit resets
Heiner Kallweit [Wed, 22 Mar 2017 21:18:37 +0000 (22:18 +0100)]
mmc: meson-gx: remove unneeded configuration bit resets

The variables holding the configuration bits are zero-initialized.
So we can remove all bit resets.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
7 years agommc: mediatek: Use data tune for CMD line tune
yong mao [Wed, 15 Mar 2017 07:26:40 +0000 (15:26 +0800)]
mmc: mediatek: Use data tune for CMD line tune

If we don't select a set of better parameters for our emmc host,
It may easily occur CMD response CRC error. And also it may cause
cannot boot up issue.

Fot getting a set of better parameters, our emmc host supports
data tune mechanism.Therefore, our emmc driver also should change
to use data tune for CMD line.

Because our emmc host use the different clock source to sample the
CMD signal between HS200 and HS400 mode, the parameters are also
different between these two modes.
Separate cmd internal delay for HS200/HS400 mode.

This change can fix "System can not boot up" issue.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dt-bindings: update Mediatek MMC bindings
yong mao [Wed, 15 Mar 2017 07:26:38 +0000 (15:26 +0800)]
mmc: dt-bindings: update Mediatek MMC bindings

Add description for mediatek,hs200-cmd-int-delay
Add description for mediatek,hs400-cmd-int-delay
Add description for mediatek,hs400-cmd-resp-sel-rising

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdio: improve mmc_io_rw_extended
Heiner Kallweit [Wed, 22 Mar 2017 20:59:29 +0000 (21:59 +0100)]
mmc: sdio: improve mmc_io_rw_extended

Improve mmc_io_rw_extended a little:
- using DIV_ROUND_UP achieves the same but is better readable
- simplify code by using sg_set_buf
- simplify one statement by using -= operator

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sh_mmcif: Document r7s72100 DT bindings
Chris Brandt [Wed, 22 Mar 2017 14:42:09 +0000 (10:42 -0400)]
mmc: sh_mmcif: Document r7s72100 DT bindings

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: tmio: always get number of taps
Masaharu Hayakawa [Fri, 17 Mar 2017 09:04:50 +0000 (10:04 +0100)]
mmc: tmio: always get number of taps

Current code gets number of taps only once and keeps the value. This is
not correct, we need to obtain it every time before executing tuning,
so remove the outer if-block.

Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
[wsa: extracted from a larger patch and reworded commit message]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: tmio: always unmap DMA before waiting for interrupt
Wolfram Sang [Thu, 16 Mar 2017 10:56:02 +0000 (11:56 +0100)]
mmc: tmio: always unmap DMA before waiting for interrupt

In the (maybe academical) case, we don't get a DATAEND interrupt after
DMA completed, we will wait endlessly for the completion to complete.
This is not bad per se, since we have a more generic completion tracking
a timeout. In that rare case, however, the DMA buffer will not get
unmapped and we have a leak. Reorder the code, so unmapping will always
take place.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-pci: Move a function to avoid later forward declaration
Adrian Hunter [Mon, 20 Mar 2017 17:50:53 +0000 (19:50 +0200)]
mmc: sdhci-pci: Move a function to avoid later forward declaration

Move a function to avoid having to forward declare it in a subsequent
patch.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Add runtime suspend/resume callbacks
Adrian Hunter [Mon, 20 Mar 2017 17:50:52 +0000 (19:50 +0200)]
mmc: sdhci-pci: Add runtime suspend/resume callbacks

Add runtime suspend/resume callbacks to match suspend/resume callbacks.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Let suspend/resume callbacks replace default callbacks
Adrian Hunter [Mon, 20 Mar 2017 17:50:51 +0000 (19:50 +0200)]
mmc: sdhci-pci: Let suspend/resume callbacks replace default callbacks

The suspend / resume callbacks lack the flexibility to allow a device to
specify a different function entirely. Change them around so that device
functions are called directly and they in turn can call the default
implementations if needed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Conditionally compile pm sleep functions
Adrian Hunter [Mon, 20 Mar 2017 17:50:50 +0000 (19:50 +0200)]
mmc: sdhci-pci: Conditionally compile pm sleep functions

It is confusing to have some parts of suspend / resume under conditional
compilation and some parts not. Use conditional compilation everywhere.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Do not use suspend/resume callbacks with runtime pm
Adrian Hunter [Mon, 20 Mar 2017 17:50:49 +0000 (19:50 +0200)]
mmc: sdhci-pci: Do not use suspend/resume callbacks with runtime pm

Do not use suspend/resume callbacks with runtime pm. It doesn't make sense
and isn't being used, so remove.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Let devices define how to add the host
Adrian Hunter [Mon, 20 Mar 2017 17:50:48 +0000 (19:50 +0200)]
mmc: sdhci-pci: Let devices define how to add the host

SDHCI provides more flexibility than simply calling sdhci_add_host(). Make
that available by allowing devices to specify their own ->add_host()
function.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Add CQE support
Adrian Hunter [Mon, 20 Mar 2017 17:50:47 +0000 (19:50 +0200)]
mmc: sdhci: Add CQE support

Add an interrupt hook and helper functions for enabling, disabling and
delivering interrupts to a CQE.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Factor out sdhci_set_default_irqs
Adrian Hunter [Mon, 20 Mar 2017 17:50:46 +0000 (19:50 +0200)]
mmc: sdhci: Factor out sdhci_set_default_irqs

Factor out sdhci_set_default_irqs().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Add sdhci_cleanup_host
Adrian Hunter [Mon, 20 Mar 2017 17:50:45 +0000 (19:50 +0200)]
mmc: sdhci: Add sdhci_cleanup_host

Add sdhci_cleanup_host() to cleanup __sdhci_add_host().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Get rid of 'extern' in header file
Adrian Hunter [Mon, 20 Mar 2017 17:50:44 +0000 (19:50 +0200)]
mmc: sdhci: Get rid of 'extern' in header file

Get rid of unnecessary 'extern' in header file.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Export sdhci_dumpregs
Adrian Hunter [Mon, 20 Mar 2017 17:50:43 +0000 (19:50 +0200)]
mmc: sdhci: Export sdhci_dumpregs

Export sdhci_dumpregs so that it can be called by drivers.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Improve register dump print format
Adrian Hunter [Mon, 20 Mar 2017 17:50:42 +0000 (19:50 +0200)]
mmc: sdhci: Improve register dump print format

Ensure all prints start with the mmc host name, and the text all lines up.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Use sdhci_readl() not readl() in sdhci_dumpregs()
Adrian Hunter [Mon, 20 Mar 2017 17:50:41 +0000 (19:50 +0200)]
mmc: sdhci: Use sdhci_readl() not readl() in sdhci_dumpregs()

Use sdhci io wrappers consistently.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Add response register to register dump
Adrian Hunter [Mon, 20 Mar 2017 17:50:40 +0000 (19:50 +0200)]
mmc: sdhci: Add response register to register dump

Add response register to register dump.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Improve debug print format
Adrian Hunter [Mon, 20 Mar 2017 17:50:39 +0000 (19:50 +0200)]
mmc: sdhci: Improve debug print format

Ensure all debug prints start with the mmc host name.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Reduce spin lock usage in sdhci_execute_tuning
Adrian Hunter [Mon, 20 Mar 2017 17:50:38 +0000 (19:50 +0200)]
mmc: sdhci: Reduce spin lock usage in sdhci_execute_tuning

Tuning execution is already synchronized with respect to other host
operations by upper layers "claiming" the host, which also takes care of
runtime pm. There can be no requests in progress. Retain the spin lock
usage only for ensuring that sending tuning commands is synchronized with
respect to the interrupt handler.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Do not use spin lock in set_ios paths
Adrian Hunter [Mon, 20 Mar 2017 17:50:37 +0000 (19:50 +0200)]
mmc: sdhci: Do not use spin lock in set_ios paths

The spin lock is not necessary in set_ios. Anything that is racing with
changes to the I/O state is already broken. The mmc core already provides
synchronization via "claiming" the host. So remove spin_lock and friends
from sdhci_set_ios and related callbacks.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Remove ->select_drive_strength() callback
Adrian Hunter [Mon, 20 Mar 2017 17:50:36 +0000 (19:50 +0200)]
mmc: sdhci: Remove ->select_drive_strength() callback

Drivers can use the host operation directly, so remove this now unused
callback.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devices
Adrian Hunter [Mon, 20 Mar 2017 17:50:35 +0000 (19:50 +0200)]
mmc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devices

Make use  of an Intel ACPI _DSM that provides eMMC driver strength.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Don't re-tune with runtime pm for some Intel devices
Adrian Hunter [Mon, 20 Mar 2017 17:50:34 +0000 (19:50 +0200)]
mmc: sdhci-pci: Don't re-tune with runtime pm for some Intel devices

Make use  of an Intel ACPI _DSM that indicates if re-tuning is needed after
D3.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci-pci: Let devices define their own private data
Adrian Hunter [Mon, 20 Mar 2017 17:50:33 +0000 (19:50 +0200)]
mmc: sdhci-pci: Let devices define their own private data

Let devices define their own private data to facilitate device-specific
operations. The size of the private structure is specified in the
sdhci_pci_fixes structure, then sdhci_pci_probe_slot() will allocate extra
space for it, and sdhci_pci_priv() can be used to get a reference to it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Let drivers decide whether to use mmc_retune_needed() with pm
Adrian Hunter [Mon, 20 Mar 2017 17:50:32 +0000 (19:50 +0200)]
mmc: sdhci: Let drivers decide whether to use mmc_retune_needed() with pm

Devices might save and restore tuning values so that re-tuning might not be
needed after a pm transition.  Let drivers decide by pushing the
mmc_retune_needed() logic down to them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: sdhci: Optimize delay loops
Adrian Hunter [Mon, 20 Mar 2017 17:50:31 +0000 (19:50 +0200)]
mmc: sdhci: Optimize delay loops

The delay loops for reset and clock enable always take at least 1 ms
because they use mdelay(1). However they can take a lot less time e.g. less
than 50us. Use ktime and reduce the delay to 10 microseconds per loop.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
7 years agommc: bcm2835: Add new driver for the sdhost controller.
Eric Anholt [Wed, 8 Mar 2017 09:19:03 +0000 (10:19 +0100)]
mmc: bcm2835: Add new driver for the sdhost controller.

The 2835 has two SD controllers: The Arasan sdhci controller (supported
by the iproc driver) and a custom sdhost controller.  This patch adds a
driver for the latter.

The sdhci controller supports both sdcard and sdio.  The sdhost
controller supports the sdcard only, but has better performance.  Also
note that the rpi3 has sdio wifi, so driving the sdcard with the sdhost
controller allows to use the sdhci controller for wifi support.

The configuration is done by devicetree via pin muxing.  Both SD
controller are available on the same pins (2 pin groups = pin 22 to 27 +
pin 48 to 53).  So it's possible to use both SD controllers at the same
time with different pin groups.

The code was originally written by Phil Elwell in the downstream
Rasbperry Pi tree.   In preparation for the upstream merge it was
cleaned up and the code base was moderized by Eric Anholt, Stefan
Wahren and Gerd Hoffmann.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agodt-bindings: Add binding for brcm,bcm2835-sdhost.
Eric Anholt [Wed, 8 Mar 2017 09:19:01 +0000 (10:19 +0100)]
dt-bindings: Add binding for brcm,bcm2835-sdhost.

This is the other SD controller on the platform, which can be swapped
to the role of SD card host using pin muxing.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: core: simplify return code
tcharding [Wed, 15 Mar 2017 08:48:04 +0000 (19:48 +1100)]
mmc: core: simplify return code

File contains multiple functions doing variations on the same thing,
sdio_readb(), sdio_writeb()f, sdio_readw(), sdio_writew()
etc. Although the functions have very similar logic the code is laid
out in a variety of ways. This makes it overly complicated to
read. There is a already a nice clean chunk of code, if we use this
format for all instances then we will have cleaned up the code,
reduced the line count and lessened the cognitive load required while
reading. Less lines equals less bugs.

Pick the most simple and clear code flow and change all functions to
be the same.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: core: guard dereference of optional parameter
tcharding [Wed, 15 Mar 2017 08:48:03 +0000 (19:48 +1100)]
mmc: core: guard dereference of optional parameter

Various functions take as parameter an optional pointer. Pointer
should be guarded with non-NULL check before dereferencing.

Add non-NULL check before dereference of pointer.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: fix error path when driver initialization fails before enabling clocks
Michał Zegan [Tue, 14 Mar 2017 20:05:20 +0000 (21:05 +0100)]
mmc: meson-gx: fix error path when driver initialization fails before enabling clocks

This patch fixes the case where meson_mmc_probe function fails before
core_clk is enabled.
Originally, that would result in a try to disable the core clock, and if
it was not already enabled, it would result in a kernel warning.
This issue is similar to the one with div_clk.
Fix it by introducing another error path used only between successfully
enabling the core clock, and successfully enabling the div clock.
That would ensure that core clock is disabled only if it was enabled before.

Signed-off-by: Michał Zegan <webczat@webczatnet.pl>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agodt-bindings: mmc: tegra: Document Tegra186 compatible string
Thierry Reding [Tue, 14 Mar 2017 19:01:52 +0000 (20:01 +0100)]
dt-bindings: mmc: tegra: Document Tegra186 compatible string

The SDHCI controller found on Tegra186 in very similar to the controller
found on earlier generations of Tegra.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agodt-bindings: mmc: tegra: Reformat compatible string list
Thierry Reding [Tue, 14 Mar 2017 19:01:51 +0000 (20:01 +0100)]
dt-bindings: mmc: tegra: Reformat compatible string list

The list of compatible strings is somewhat difficult to read and extend.
Reformat it into a list to make it more easily extensible.

While at it, also remove the "plus one of the above" clause because it
isn't actually valid.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-st: remove unnecessary platform_set_drvdata() call
Jisheng Zhang [Fri, 10 Mar 2017 03:17:33 +0000 (11:17 +0800)]
mmc: sdhci-st: remove unnecessary platform_set_drvdata() call

sdhci_pltfm_init() has already set the platform drvdata for us, remove
the unnecessary platform_set_drvdata() call.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-pxav2: remove unnecessary platform_set_drvdata() call
Jisheng Zhang [Fri, 10 Mar 2017 03:17:32 +0000 (11:17 +0800)]
mmc: sdhci-pxav2: remove unnecessary platform_set_drvdata() call

sdhci_pltfm_init() has already set the platform drvdata for us, remove
the unnecessary platform_set_drvdata() call.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-pxav3: remove unnecessary platform_set_drvdata() call
Jisheng Zhang [Fri, 10 Mar 2017 03:17:31 +0000 (11:17 +0800)]
mmc: sdhci-pxav3: remove unnecessary platform_set_drvdata() call

sdhci_pltfm_init() has already set the platform drvdata for us, remove
the unnecessary platform_set_drvdata() call.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-cadence: add HS400 enhanced strobe support
Piotr Sroka [Mon, 6 Mar 2017 08:28:41 +0000 (08:28 +0000)]
mmc: sdhci-cadence: add HS400 enhanced strobe support

Add support for HS400ES mode to Cadence SDHCI driver.

Signed-off-by: Piotr Sroka <piotrs@cadence.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: tegra: Add Tegra186 support
Thierry Reding [Wed, 8 Mar 2017 19:00:40 +0000 (20:00 +0100)]
mmc: tegra: Add Tegra186 support

The SDHCI controller found on NVIDIA Tegra186 SoCs is very similar to
the one on prior generations of Tegra and can be supported by the same
driver.

Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: tegra: Support module reset
Thierry Reding [Wed, 8 Mar 2017 19:00:39 +0000 (20:00 +0100)]
mmc: tegra: Support module reset

The device tree binding for the SDHCI controller found on Tegra SoCs
specifies that a reset control can be provided by the device tree. No
code was ever added to support the module reset, which can cause the
driver to try and access registers from a module that's in reset. On
most Tegra SoC generations doing so would cause a hang.

Note that it's unlikely to see this happen because on most platforms
these resets will have been deasserted by the bootloader. However the
portability can be improved by making sure the driver deasserts the
reset before accessing any registers.

Since resets are synchronous on Tegra SoCs, the platform driver needs
to implement a custom ->remove() callback now to make sure the clock
is disabled after the reset is asserted.

Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove mmc host on device removal
Michał Zegan [Sat, 18 Feb 2017 17:06:47 +0000 (18:06 +0100)]
mmc: meson-gx: remove mmc host on device removal

The mmc host was added in meson_mmc_probe, but never removed in
meson_mmc_remove.
Fix that by removing the host before deallocating other resources.

Signed-off-by: Michał Zegan <webczat@webczatnet.pl>
Tested-by: Michał Zegan <webczat@webczatnet.pl>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: host: tmio: fill in response from auto cmd12
Wolfram Sang [Tue, 14 Mar 2017 10:09:19 +0000 (11:09 +0100)]
mmc: host: tmio: fill in response from auto cmd12

After we received the dataend interrupt, R1 response register carries
the value from the automatically generated stop command. Report that
info back to the MMC block layer, so we will be notified in case of e.g.
ECC errors which happened during the last transfer.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: host: tmio: don't BUG on unsupported stop commands
Wolfram Sang [Tue, 14 Mar 2017 10:09:18 +0000 (11:09 +0100)]
mmc: host: tmio: don't BUG on unsupported stop commands

Halting the kernel on an unsupported stop command seems overkill, report
the error and say what we already did (due to autocmd12) instead.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: host: tmio: fix minor typos in comments
Wolfram Sang [Tue, 14 Mar 2017 10:09:17 +0000 (11:09 +0100)]
mmc: host: tmio: fix minor typos in comments

Making sure we match the actual register names.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: host: tmio: use defines for CTL_STOP_INTERNAL_ACTION values
Wolfram Sang [Tue, 14 Mar 2017 10:09:16 +0000 (11:09 +0100)]
mmc: host: tmio: use defines for CTL_STOP_INTERNAL_ACTION values

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: tmio: ensure end of DMA and SD access are in sync
Wolfram Sang [Fri, 17 Feb 2017 18:22:41 +0000 (19:22 +0100)]
mmc: tmio: ensure end of DMA and SD access are in sync

The current code assumes that DMA is finished before SD access end is
flagged. Thus, it schedules the 'dma_complete' tasklet in the SD card
interrupt routine when DATAEND is set. The assumption is not safe,
though. Even by mounting an SD card, it can be seen that sometimes DMA
complete is first, sometimes DATAEND. It seems they are usually close
enough timewise to not cause problems. However, a customer reported that
with CMD53 sometimes things really break apart. As a result, the BSP has
a patch which introduces flags for both events and makes sure both flags
are set before scheduling the tasklet. The customer accepted the patch,
yet it doesn't seem a proper upstream solution to me.

This patch refactors the code to replace the tasklet with already
existing and more lightweight mechanisms. First of all, we set the
callback in a DMA descriptor to automatically get notified when DMA is
done. In the callback, we then use a completion to make sure the SD
access has already ended. Then, we proceed as before.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: sdhci-pxav2: add error handling of clk_prepare_enable()
Alexey Khoroshilov [Fri, 10 Feb 2017 22:54:46 +0000 (01:54 +0300)]
mmc: sdhci-pxav2: add error handling of clk_prepare_enable()

There is no check if clk_prepare_enable() succeed in sdhci_pxav2_probe().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: replace magic timeout numbers with constants
Heiner Kallweit [Sat, 4 Mar 2017 12:37:46 +0000 (13:37 +0100)]
mmc: meson-gx: replace magic timeout numbers with constants

Replace timeout magic numbers with proper constants.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove member mrq from struct meson_host
Heiner Kallweit [Sat, 4 Mar 2017 12:36:45 +0000 (13:36 +0100)]
mmc: meson-gx: remove member mrq from struct meson_host

Struct mmc_command includes a reference to the related mmc_request.
Therefore we don't have to store mrq separately in struct meson_host.
And we can remove some now unneeded WARN_ON's.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: improve initial configuration
Heiner Kallweit [Sat, 4 Mar 2017 12:35:13 +0000 (13:35 +0100)]
mmc: meson-gx: improve initial configuration

Config values which are not changed during runtime we can set
in the probe function already.
The block size setting is overwritten later in
meson_mmc_start_cmd anyway if needed, so it doesn't harm if we
remove this setting in meson_mmc_set_ios.

In addition write config register only if configuration changed.

Don't change the location of clock initialization as in an
earlier version of the patch, this change causes a hang.
This issue was reported and fix suggested by:
Helmut Klein <hgkr.klein@gmail.com>

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove unneeded devm_kstrdup in meson_mmc_clk_init
Heiner Kallweit [Sat, 4 Mar 2017 12:26:24 +0000 (13:26 +0100)]
mmc: meson-gx: remove unneeded devm_kstrdup in meson_mmc_clk_init

CLK core does a deep copy of init.name, therefore it's fully ok to
provide a local variable.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: fix error path in meson_mmc_clk_init / meson_mmc_probe
Heiner Kallweit [Sat, 4 Mar 2017 12:25:14 +0000 (13:25 +0100)]
mmc: meson-gx: fix error path in meson_mmc_clk_init / meson_mmc_probe

The condition should be "if (ret)" as the disable/unprepare is
supposed to be executed if the previous command fails.
In addition adjust the error path in probe to properly deal
with the case that cfg_div_clk can be registered successfully
but enable/prepare fails.
In this case we shouldn't call clk_disable_unprepare.

Reported-by: Michał Zegan <webczat_200@poczta.onet.pl>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove member parent_mux from struct meson_host
Heiner Kallweit [Sat, 4 Mar 2017 12:24:09 +0000 (13:24 +0100)]
mmc: meson-gx: remove member parent_mux from struct meson_host

Member mux_parent isn't used outside meson_mmc_clk_init. So remove it
and replace it with a local variable in meson_mmc_clk_init.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove unneeded variable in meson_mmc_clk_init
Heiner Kallweit [Sat, 4 Mar 2017 12:22:57 +0000 (13:22 +0100)]
mmc: meson-gx: remove unneeded variable in meson_mmc_clk_init

Because the DT requires a fixed number of mux parent clocks,
variable mux_parent_count can be replaced with constant
MUX_CLK_NUM_PARENTS, so remove it.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: remove unused members irq, ocr_mask from struct meson_host
Heiner Kallweit [Sat, 4 Mar 2017 12:21:54 +0000 (13:21 +0100)]
mmc: meson-gx: remove unused members irq, ocr_mask from struct meson_host

Member ocr_mask is never used and member irq we can replace with a
local variable in meson_mmc_probe. So let's remove both members.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: make two functions return void
Heiner Kallweit [Sat, 4 Mar 2017 12:20:44 +0000 (13:20 +0100)]
mmc: meson-gx: make two functions return void

The return value of meson_mmc_request_done and meson_mmc_read_resp
isn't used, so make both functions return void.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: meson-gx: simplify bounce buffer setting in meson_mmc_start_cmd
Heiner Kallweit [Sat, 4 Mar 2017 12:19:23 +0000 (13:19 +0100)]
mmc: meson-gx: simplify bounce buffer setting in meson_mmc_start_cmd

Core ensures that there are no commands with cmd->data being set and
nothing to transfer. And we don't have to reset bit CMD_CFG_DATA_NUM
because cmd_cfg was zero-initialized and this bit isn't set.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: improve dw_mci_reset a bit
Shawn Lin [Fri, 17 Feb 2017 02:59:52 +0000 (10:59 +0800)]
mmc: dw_mmc: improve dw_mci_reset a bit

Too much condition iteration makes the code
less readable. Slightly improve it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: move mci_send_cmd forward to avoid declaration
Shawn Lin [Fri, 17 Feb 2017 02:59:44 +0000 (10:59 +0800)]
mmc: dw_mmc: move mci_send_cmd forward to avoid declaration

No functional change intended.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: remove declaration of dw_mci_card_busy
Shawn Lin [Fri, 17 Feb 2017 02:59:35 +0000 (10:59 +0800)]
mmc: dw_mmc: remove declaration of dw_mci_card_busy

No need to declar it there, remove it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: move dw_mci_get_cd forward to avoid declaration
Shawn Lin [Fri, 17 Feb 2017 02:56:42 +0000 (10:56 +0800)]
mmc: dw_mmc: move dw_mci_get_cd forward to avoid declaration

No functional change intended.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: move dw_mci_ctrl_reset forward to avoid declaration
Shawn Lin [Fri, 17 Feb 2017 02:56:41 +0000 (10:56 +0800)]
mmc: dw_mmc: move dw_mci_ctrl_reset forward to avoid declaration

No functional change intended.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: move dw_mci_reset forward to avoid declaration
Shawn Lin [Fri, 17 Feb 2017 02:56:40 +0000 (10:56 +0800)]
mmc: dw_mmc: move dw_mci_reset forward to avoid declaration

No functional change intended.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agommc: dw_mmc: improve the timeout polling code
Shawn Lin [Fri, 17 Feb 2017 02:56:39 +0000 (10:56 +0800)]
mmc: dw_mmc: improve the timeout polling code

Just use the readl_poll_timeout{_atomic} to avold open
coding them.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
7 years agoLinux 4.11-rc8
Linus Torvalds [Sun, 23 Apr 2017 23:53:00 +0000 (16:53 -0700)]
Linux 4.11-rc8

7 years agoMerge tag 'upstream-4.11-rc7' of git://git.infradead.org/linux-ubifs
Linus Torvalds [Sun, 23 Apr 2017 23:49:16 +0000 (16:49 -0700)]
Merge tag 'upstream-4.11-rc7' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS fixes from Richard Weinberger:
 "This contains fixes for issues in both UBI and UBIFS:

   - more O_TMPFILE fallout

   - RENAME_WHITEOUT regression due to a mis-merge

   - memory leak in ubifs_mknod()

   - power-cut problem in UBI's update volume feature"

* tag 'upstream-4.11-rc7' of git://git.infradead.org/linux-ubifs:
  ubifs: Fix O_TMPFILE corner case in ubifs_link()
  ubifs: Fix RENAME_WHITEOUT support
  ubifs: Fix debug messages for an invalid filename in ubifs_dump_inode
  ubifs: Fix debug messages for an invalid filename in ubifs_dump_node
  ubifs: Remove filename from debug messages in ubifs_readdir
  ubifs: Fix memory leak in error path in ubifs_mknod
  ubi/upd: Always flush after prepared for an update

7 years agoMerge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 23 Apr 2017 19:51:42 +0000 (12:51 -0700)]
Merge branch 'ras-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull RAS fix from Thomas Gleixner:
 "The MCE atomic notifier callchain invokes callbacks which might sleep.

  Convert it to a blocking notifier and prevent calls from atomic
  context"

* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Make the MCE notifier a blocking one

7 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 23 Apr 2017 19:48:05 +0000 (12:48 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "The (hopefully) final fix for the irq affinity spreading logic"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/affinity: Fix calculating vectors to assign

7 years agoMerge tag 'nfsd-4.11-2' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Fri, 21 Apr 2017 23:37:48 +0000 (16:37 -0700)]
Merge tag 'nfsd-4.11-2' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfix from Bruce Fields:
 "Fix a 4.11 regression that triggers a BUG() on an attempt to use an
  unsupported NFSv4 compound op"

* tag 'nfsd-4.11-2' of git://linux-nfs.org/~bfields/linux:
  nfsd: fix oops on unsupported operation

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Fri, 21 Apr 2017 20:20:47 +0000 (13:20 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Don't race in IPSEC dumps, from Yuejie Shi.

 2) Verify lengths properly in IPSEC reqeusts, from Herbert Xu.

 3) Fix out of bounds access in ipv6 segment routing code, from David
    Lebrun.

 4) Don't write into the header of cloned SKBs in smsc95xx driver, from
    James Hughes.

 5) Several other drivers have this bug too, fix them. From Eric
    Dumazet.

 6) Fix access to uninitialized data in TC action cookie code, from
    Wolfgang Bumiller.

 7) Fix double free in IPV6 segment routing, again from David Lebrun.

 8) Don't let userspace set the RTF_PCPU flag, oops. From David Ahern.

 9) Fix use after free in qrtr code, from Dan Carpenter.

10) Don't double-destroy devices in ip6mr code, from Nikolay
    Aleksandrov.

11) Don't pass out-of-range TX queue indices into drivers, from Tushar
    Dave.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (30 commits)
  netpoll: Check for skb->queue_mapping
  ip6mr: fix notification device destruction
  bpf, doc: update bpf maintainers entry
  net: qrtr: potential use after free in qrtr_sendmsg()
  bpf: Fix values type used in test_maps
  net: ipv6: RTF_PCPU should not be settable from userspace
  gso: Validate assumption of frag_list segementation
  kaweth: use skb_cow_head() to deal with cloned skbs
  ch9200: use skb_cow_head() to deal with cloned skbs
  lan78xx: use skb_cow_head() to deal with cloned skbs
  sr9700: use skb_cow_head() to deal with cloned skbs
  cx82310_eth: use skb_cow_head() to deal with cloned skbs
  smsc75xx: use skb_cow_head() to deal with cloned skbs
  ipv6: sr: fix double free of skb after handling invalid SRH
  MAINTAINERS: Add "B:" field for networking.
  net sched actions: allocate act cookie early
  qed: Fix issue in populating the PFC config paramters.
  qed: Fix possible system hang in the dcbnl-getdcbx() path.
  qed: Fix sending an invalid PFC error mask to MFW.
  qed: Fix possible error in populating max_tc field.
  ...

7 years agonetpoll: Check for skb->queue_mapping
Tushar Dave [Thu, 20 Apr 2017 22:57:31 +0000 (15:57 -0700)]
netpoll: Check for skb->queue_mapping

Reducing real_num_tx_queues needs to be in sync with skb queue_mapping
otherwise skbs with queue_mapping greater than real_num_tx_queues
can be sent to the underlying driver and can result in kernel panic.

One such event is running netconsole and enabling VF on the same
device. Or running netconsole and changing number of tx queues via
ethtool on same device.

e.g.
Unable to handle kernel NULL pointer dereference
tsk->{mm,active_mm}->context = 0000000000001525
tsk->{mm,active_mm}->pgd = fff800130ff9a000
              \|/ ____ \|/
              "@'/ .. \`@"
              /_| \__/ |_\
                 \__U_/
kworker/48:1(475): Oops [#1]
CPU: 48 PID: 475 Comm: kworker/48:1 Tainted: G           OE
4.11.0-rc3-davem-net+ #7
Workqueue: events queue_process
task: fff80013113299c0 task.stack: fff800131132c000
TSTATE: 0000004480e01600 TPC: 00000000103f9e3c TNPC: 00000000103f9e40 Y:
00000000    Tainted: G           OE
TPC: <ixgbe_xmit_frame_ring+0x7c/0x6c0 [ixgbe]>
g0: 0000000000000000 g1: 0000000000003fff g2: 0000000000000000 g3:
0000000000000001
g4: fff80013113299c0 g5: fff8001fa6808000 g6: fff800131132c000 g7:
00000000000000c0
o0: fff8001fa760c460 o1: fff8001311329a50 o2: fff8001fa7607504 o3:
0000000000000003
o4: fff8001f96e63a40 o5: fff8001311d77ec0 sp: fff800131132f0e1 ret_pc:
000000000049ed94
RPC: <set_next_entity+0x34/0xb80>
l0: 0000000000000000 l1: 0000000000000800 l2: 0000000000000000 l3:
0000000000000000
l4: 000b2aa30e34b10d l5: 0000000000000000 l6: 0000000000000000 l7:
fff8001fa7605028
i0: fff80013111a8a00 i1: fff80013155a0780 i2: 0000000000000000 i3:
0000000000000000
i4: 0000000000000000 i5: 0000000000100000 i6: fff800131132f1a1 i7:
00000000103fa4b0
I7: <ixgbe_xmit_frame+0x30/0xa0 [ixgbe]>
Call Trace:
 [00000000103fa4b0] ixgbe_xmit_frame+0x30/0xa0 [ixgbe]
 [0000000000998c74] netpoll_start_xmit+0xf4/0x200
 [0000000000998e10] queue_process+0x90/0x160
 [0000000000485fa8] process_one_work+0x188/0x480
 [0000000000486410] worker_thread+0x170/0x4c0
 [000000000048c6b8] kthread+0xd8/0x120
 [0000000000406064] ret_from_fork+0x1c/0x2c
 [0000000000000000]           (null)
Disabling lock debugging due to kernel taint
Caller[00000000103fa4b0]: ixgbe_xmit_frame+0x30/0xa0 [ixgbe]
Caller[0000000000998c74]: netpoll_start_xmit+0xf4/0x200
Caller[0000000000998e10]: queue_process+0x90/0x160
Caller[0000000000485fa8]: process_one_work+0x188/0x480
Caller[0000000000486410]: worker_thread+0x170/0x4c0
Caller[000000000048c6b8]: kthread+0xd8/0x120
Caller[0000000000406064]: ret_from_fork+0x1c/0x2c
Caller[0000000000000000]:           (null)

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoip6mr: fix notification device destruction
Nikolay Aleksandrov [Fri, 21 Apr 2017 17:42:16 +0000 (20:42 +0300)]
ip6mr: fix notification device destruction

Andrey Konovalov reported a BUG caused by the ip6mr code which is caused
because we call unregister_netdevice_many for a device that is already
being destroyed. In IPv4's ipmr that has been resolved by two commits
long time ago by introducing the "notify" parameter to the delete
function and avoiding the unregister when called from a notifier, so
let's do the same for ip6mr.

The trace from Andrey:
------------[ cut here ]------------
kernel BUG at net/core/dev.c:6813!
invalid opcode: 0000 [#1] SMP KASAN
Modules linked in:
CPU: 1 PID: 1165 Comm: kworker/u4:3 Not tainted 4.11.0-rc7+ #251
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs
01/01/2011
Workqueue: netns cleanup_net
task: ffff880069208000 task.stack: ffff8800692d8000
RIP: 0010:rollback_registered_many+0x348/0xeb0 net/core/dev.c:6813
RSP: 0018:ffff8800692de7f0 EFLAGS: 00010297
RAX: ffff880069208000 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88006af90569
RBP: ffff8800692de9f0 R08: ffff8800692dec60 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000000 R12: ffff88006af90070
R13: ffff8800692debf0 R14: dffffc0000000000 R15: ffff88006af90000
FS:  0000000000000000(0000) GS:ffff88006cb00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7e897d870 CR3: 00000000657e7000 CR4: 00000000000006e0
Call Trace:
 unregister_netdevice_many.part.105+0x87/0x440 net/core/dev.c:7881
 unregister_netdevice_many+0xc8/0x120 net/core/dev.c:7880
 ip6mr_device_event+0x362/0x3f0 net/ipv6/ip6mr.c:1346
 notifier_call_chain+0x145/0x2f0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1647
 call_netdevice_notifiers net/core/dev.c:1663
 rollback_registered_many+0x919/0xeb0 net/core/dev.c:6841
 unregister_netdevice_many.part.105+0x87/0x440 net/core/dev.c:7881
 unregister_netdevice_many net/core/dev.c:7880
 default_device_exit_batch+0x4fa/0x640 net/core/dev.c:8333
 ops_exit_list.isra.4+0x100/0x150 net/core/net_namespace.c:144
 cleanup_net+0x5a8/0xb40 net/core/net_namespace.c:463
 process_one_work+0xc04/0x1c10 kernel/workqueue.c:2097
 worker_thread+0x223/0x19c0 kernel/workqueue.c:2231
 kthread+0x35e/0x430 kernel/kthread.c:231
 ret_from_fork+0x31/0x40 arch/x86/entry/entry_64.S:430
Code: 3c 32 00 0f 85 70 0b 00 00 48 b8 00 02 00 00 00 00 ad de 49 89
47 78 e9 93 fe ff ff 49 8d 57 70 49 8d 5f 78 eb 9e e8 88 7a 14 fe <0f>
0b 48 8b 9d 28 fe ff ff e8 7a 7a 14 fe 48 b8 00 00 00 00 00
RIP: rollback_registered_many+0x348/0xeb0 RSP: ffff8800692de7f0
---[ end trace e0b29c57e9b3292c ]---

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, doc: update bpf maintainers entry
Daniel Borkmann [Thu, 20 Apr 2017 15:27:58 +0000 (17:27 +0200)]
bpf, doc: update bpf maintainers entry

Add various related files that have been missing under
BPF entry covering essential parts of its infrastructure
and also add myself as co-maintainer.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: qrtr: potential use after free in qrtr_sendmsg()
Dan Carpenter [Thu, 20 Apr 2017 10:21:30 +0000 (13:21 +0300)]
net: qrtr: potential use after free in qrtr_sendmsg()

If skb_pad() fails then it frees the skb so we should check for errors.

Fixes: bdabad3e363d ("net: Add Qualcomm IPC router")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: Fix values type used in test_maps
David Miller [Thu, 20 Apr 2017 19:20:16 +0000 (15:20 -0400)]
bpf: Fix values type used in test_maps

Maps of per-cpu type have their value element size adjusted to 8 if it
is specified smaller during various map operations.

This makes test_maps as a 32-bit binary fail, in fact the kernel
writes past the end of the value's array on the user's stack.

To be quite honest, I think the kernel should reject creation of a
per-cpu map that doesn't have a value size of at least 8 if that's
what the kernel is going to silently adjust to later.

If the user passed something smaller, it is a sizeof() calcualtion
based upon the type they will actually use (just like in this testcase
code) in later calls to the map operations.

Fixes: df570f577231 ("samples/bpf: unit test for BPF_MAP_TYPE_PERCPU_ARRAY")
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
7 years agonet: ipv6: RTF_PCPU should not be settable from userspace
David Ahern [Wed, 19 Apr 2017 21:19:43 +0000 (14:19 -0700)]
net: ipv6: RTF_PCPU should not be settable from userspace

Andrey reported a fault in the IPv6 route code:

kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Modules linked in:
CPU: 1 PID: 4035 Comm: a.out Not tainted 4.11.0-rc7+ #250
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff880069809600 task.stack: ffff880062dc8000
RIP: 0010:ip6_rt_cache_alloc+0xa6/0x560 net/ipv6/route.c:975
RSP: 0018:ffff880062dced30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8800670561c0 RCX: 0000000000000006
RDX: 0000000000000003 RSI: ffff880062dcfb28 RDI: 0000000000000018
RBP: ffff880062dced68 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff880062dcfb28 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007feebe37e7c0(0000) GS:ffff88006cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000205a0fe4 CR3: 000000006b5c9000 CR4: 00000000000006e0
Call Trace:
 ip6_pol_route+0x1512/0x1f20 net/ipv6/route.c:1128
 ip6_pol_route_output+0x4c/0x60 net/ipv6/route.c:1212
...

Andrey's syzkaller program passes rtmsg.rtmsg_flags with the RTF_PCPU bit
set. Flags passed to the kernel are blindly copied to the allocated
rt6_info by ip6_route_info_create making a newly inserted route appear
as though it is a per-cpu route. ip6_rt_cache_alloc sees the flag set
and expects rt->dst.from to be set - which it is not since it is not
really a per-cpu copy. The subsequent call to __ip6_dst_alloc then
generates the fault.

Fix by checking for the flag and failing with EINVAL.

Fixes: d52d3997f843f ("ipv6: Create percpu rt6_info")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agogso: Validate assumption of frag_list segementation
Ilan Tayari [Wed, 19 Apr 2017 18:26:07 +0000 (21:26 +0300)]
gso: Validate assumption of frag_list segementation

Commit 07b26c9454a2 ("gso: Support partial splitting at the frag_list
pointer") assumes that all SKBs in a frag_list (except maybe the last
one) contain the same amount of GSO payload.

This assumption is not always correct, resulting in the following
warning message in the log:
    skb_segment: too many frags

For example, mlx5 driver in Striding RQ mode creates some RX SKBs with
one frag, and some with 2 frags.
After GRO, the frag_list SKBs end up having different amounts of payload.
If this frag_list SKB is then forwarded, the aforementioned assumption
is violated.

Validate the assumption, and fall back to software GSO if it not true.

Change-Id: Ia03983f4a47b6534dd987d7a2aad96d54d46d212
Fixes: 07b26c9454a2 ("gso: Support partial splitting at the frag_list pointer")
Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'skb_cow_head'
David S. Miller [Fri, 21 Apr 2017 17:24:07 +0000 (13:24 -0400)]
Merge branch 'skb_cow_head'

Eric Dumazet says:

====================
net: use skb_cow_head() to deal with cloned skbs

James Hughes found an issue with smsc95xx driver. Same problematic code
is found in other drivers.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agokaweth: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:26 +0000 (09:59 -0700)]
kaweth: use skb_cow_head() to deal with cloned skbs

We can use skb_cow_head() to properly deal with clones,
especially the ones coming from TCP stack that allow their head being
modified. This avoids a copy.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoch9200: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:25 +0000 (09:59 -0700)]
ch9200: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: 4a476bd6d1d9 ("usbnet: New driver for QinHeng CH9200 devices")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agolan78xx: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:24 +0000 (09:59 -0700)]
lan78xx: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Cc: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosr9700: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:23 +0000 (09:59 -0700)]
sr9700: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: c9b37458e956 ("USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocx82310_eth: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:22 +0000 (09:59 -0700)]
cx82310_eth: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: cc28a20e77b2 ("introduce cx82310_eth: Conexant CX82310-based ADSL router USB ethernet driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosmsc75xx: use skb_cow_head() to deal with cloned skbs
Eric Dumazet [Wed, 19 Apr 2017 16:59:21 +0000 (09:59 -0700)]
smsc75xx: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: d0cad871703b ("smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: sr: fix double free of skb after handling invalid SRH
David Lebrun [Wed, 19 Apr 2017 14:10:19 +0000 (16:10 +0200)]
ipv6: sr: fix double free of skb after handling invalid SRH

The icmpv6_param_prob() function already does a kfree_skb(),
this patch removes the duplicate one.

Fixes: 1ababeba4a21f3dba3da3523c670b207fb2feb62 ("ipv6: implement dataplane support for rthdr type 4 (Segment Routing Header)")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'powerpc-4.11-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 21 Apr 2017 16:34:45 +0000 (09:34 -0700)]
Merge tag 'powerpc-4.11-8' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Just two fixes.

  The first fixes kprobing a stdu, and is marked for stable as it's been
  broken for ~ever. In hindsight this could have gone in next.

  The other is a fix for a change we merged this cycle, where if we take
  a certain exception when the kernel is running relocated (currently
  only used for kdump), we checkstop the box.

  Thanks to Ravi Bangoria"

* tag 'powerpc-4.11-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64: Fix HMI exception on LE with CONFIG_RELOCATABLE=y
  powerpc/kprobe: Fix oops when kprobed on 'stdu' instruction

7 years agoMerge tag 'pci-v4.11-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Fri, 21 Apr 2017 16:26:34 +0000 (09:26 -0700)]
Merge tag 'pci-v4.11-fixes-5' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Sorry this is so late. It's been in -next for over a week, but I
  forgot to send it on until now.

  A single fix to the DT binding of the HiSilicon PCIe host support"

* tag 'pci-v4.11-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: hisi: Fix DT binding (hisi-pcie-almost-ecam)

7 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 21 Apr 2017 16:20:35 +0000 (09:20 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block layer fixes from Jens Axboe:
 "A couple of last minute fixes for regressions in this cycle. More
  specifically:

   - Two patches from Andy, adjusting the NVMe APST quirks to avoid some
     issues specific to one Toshiba drive, and some variant of Samsung
     on two specific Dell laptops.

   - A fix for mtip32xx, turning off mq scheduling on that device. We
     have a real fix for this, but it's too late in the cycle.
     Thankfully we already have a NO_SCHED flag we can apply here. A
     prep patch for this is ensuring that we honor the NO_SCHED flag
     when attempting to online switch schedulers, previsouly we only did
     so for drive load time. From Ming.

   - Fixing an oops in blk-mq polling with scheduling attached. This one
     is easily reproducible, it would be a shame to release 4.11 with
     that issue. From me.

  I'd prefer not having to send in patches at this point in time, but
  the above are all things that have regressed in this cycle and the
  fixes are relatively straight forward"

* 'for-linus' of git://git.kernel.dk/linux-block:
  blk-mq: fix potential oops with polling and blk-mq scheduler
  nvme: Quirk APST off on "THNSF5256GPUK TOSHIBA"
  nvme: Adjust the Samsung APST quirk
  mtip32xx: pass BLK_MQ_F_NO_SCHED
  block: respect BLK_MQ_F_NO_SCHED

7 years agoMerge tag 'acpi-4.11-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 21 Apr 2017 16:18:17 +0000 (09:18 -0700)]
Merge tag 'acpi-4.11-final' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI build fix from Rafael Wysocki:
 "This avoids a false-positive build warning from the compiler.

  Specifics:

   - Avoid a false-positive warning regarding a variable that may not be
     initialized that started to trigger after a previous general build
     fix (Arnd Bergmann)"

* tag 'acpi-4.11-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / power: Avoid maybe-uninitialized warning

7 years agoMerge tag 'mmc-v4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 21 Apr 2017 16:15:43 +0000 (09:15 -0700)]
Merge tag 'mmc-v4.11-rc7' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:

   - kmalloc sdio scratch buffer to make it DMA-friendly

  MMC host:

   - dw_mmc: Fix behaviour for SDIO IRQs when runtime PM is used

   - sdhci-esdhc-imx: Correct pad I/O drive strength for UHS-DDR50
     cards"

* tag 'mmc-v4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for DDR50 card
  mmc: dw_mmc: Don't allow Runtime PM for SDIO cards
  mmc: sdio: fix alignment issue in struct sdio_func

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Fri, 21 Apr 2017 16:13:43 +0000 (09:13 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixlet from Dmitry Torokhov:
 "An update to Elan PS/2 driver to allow working on yet another
  Lifebook"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elantech - add Fujitsu Lifebook E547 to force crc_enabled

7 years agoMAINTAINERS: Add "B:" field for networking.
David S. Miller [Fri, 21 Apr 2017 14:44:47 +0000 (10:44 -0400)]
MAINTAINERS: Add "B:" field for networking.

We want people to report bugs to the netdev list.

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Thu, 20 Apr 2017 22:31:08 +0000 (15:31 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge two mm fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: prevent NR_ISOLATE_* stats from going negative
  Revert "mm, page_alloc: only use per-cpu allocator for irq-safe requests"

7 years agomm: prevent NR_ISOLATE_* stats from going negative
Rabin Vincent [Thu, 20 Apr 2017 21:37:46 +0000 (14:37 -0700)]
mm: prevent NR_ISOLATE_* stats from going negative

Commit 6afcf8ef0ca0 ("mm, compaction: fix NR_ISOLATED_* stats for pfn
based migration") moved the dec_node_page_state() call (along with the
page_is_file_cache() call) to after putback_lru_page().

But page_is_file_cache() can change after putback_lru_page() is called,
so it should be called before putback_lru_page(), as it was before that
patch, to prevent NR_ISOLATE_* stats from going negative.

Without this fix, non-CONFIG_SMP kernels end up hanging in the
while(too_many_isolated()) { congestion_wait() } loop in
shrink_active_list() due to the negative stats.

 Mem-Info:
  active_anon:32567 inactive_anon:121 isolated_anon:1
  active_file:6066 inactive_file:6639 isolated_file:4294967295
                                                    ^^^^^^^^^^
  unevictable:0 dirty:115 writeback:0 unstable:0
  slab_reclaimable:2086 slab_unreclaimable:3167
  mapped:3398 shmem:18366 pagetables:1145 bounce:0
  free:1798 free_pcp:13 free_cma:0

Fixes: 6afcf8ef0ca0 ("mm, compaction: fix NR_ISOLATED_* stats for pfn based migration")
Link: http://lkml.kernel.org/r/1492683865-27549-1-git-send-email-rabin.vincent@axis.com
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Ming Ling <ming.ling@spreadtrum.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>