GitHub/LineageOS/android_kernel_motorola_exynos9610.git
10 years agomtd: st_spi_fsm: Provide the default read/write configurations
Lee Jones [Thu, 20 Mar 2014 09:20:53 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Provide the default read/write configurations

Message sequences can vary depending on how many pads (lines) are
required to address the chip (mode & dummy), how many data pads (lines)
are required to write out to the chip which will determine speed
amongst other things which are detailed by the SFDP specification. We
are able to use multiple configurations for each chip, but they need
to me matched to a device's capabilities. These configurations are
listed in preference order - most preferred first.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Update the flash Volatile Configuration Register
Lee Jones [Thu, 20 Mar 2014 09:20:52 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Update the flash Volatile Configuration Register

The FSM Serial Flash Controller is driven by issuing a standard set of
register writes we call a message sequence. This patch supplies a method
to prepare the message sequence responsible for updating a chip's VCR.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Provide a method to put the chip into 32bit addressing mode
Lee Jones [Thu, 20 Mar 2014 09:20:51 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Provide a method to put the chip into 32bit addressing mode

Most Serial Flash chips support 24bit addressing as a default but more
recent incarnations can support 32bit. Based on information provided
though platform specific data and capabilities we can determine whether
or not our current chip can. This patch provides a means to setup the
FSM message sequence to put the chip into 32bit mode.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Add a check to if the chip can handle an SoC reset
Lee Jones [Thu, 20 Mar 2014 09:20:50 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Add a check to if the chip can handle an SoC reset

Based on information we can obtain though platform specific data and/or
chip capabilities we are able to determine whether or not we can handle
a SoC reset or not. To find out why this is important please read the
comment provided in the patch.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Prepare read/write sequences according to configuration
Lee Jones [Thu, 20 Mar 2014 09:20:49 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Prepare read/write sequences according to configuration

Firstly we search for our preference read/write configuration based on a
given chip's capabilities. Then we actually set up the message sequence
accordingly.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Provide the sequence for enabling 32bit addressing mode
Lee Jones [Thu, 20 Mar 2014 09:20:48 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Provide the sequence for enabling 32bit addressing mode

The FSM Serial Flash Controller is driven by issuing a standard set of
register writes we call a message sequence. This patch supplies a method
to prepare the message sequence responsible for setting 32bit addressing
mode on the Flash chip.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Provide the erase one sector sequence
Lee Jones [Thu, 20 Mar 2014 09:20:47 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Provide the erase one sector sequence

The FSM Serial Flash Controller is driven by issuing a standard set of
register writes we call a message sequence. This patch supplies a method
to prepare the message sequence responsible for erasing a single sector.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Fetch boot-device from mode pins
Lee Jones [Thu, 20 Mar 2014 09:20:46 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Fetch boot-device from mode pins

It's important for us to determine which device was used to boot from in
order to make some correct decisions surrounding Power Management. On
each of the platforms which support the FSM this is communicated via
a set of mode pins held in the system configuration area. This patch
determine the boot device and stores the result.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Add device-tree binding documentation
Lee Jones [Thu, 20 Mar 2014 09:20:45 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Add device-tree binding documentation

Cc: devicetree@vger.kernel.org
Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Prepare the read/write FSM message sequence(s)
Lee Jones [Thu, 20 Mar 2014 09:20:44 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Prepare the read/write FSM message sequence(s)

The FSM Serial Flash Controller is driven by issuing a standard set of
register writes we call a message sequence. This patch supplies a method
to prepare read/write FSM message sequence(s) based on chip capability
and configuration.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Use device size to determine address width
Lee Jones [Thu, 20 Mar 2014 09:20:43 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Use device size to determine address width

Take some known parameters, namely size and number of sectors and use
them to determine weather a device can support 32bit addressing or not.
If it can, set the associated flash capability flag for latter use.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Search for preferred FSM message sequence configurations
Lee Jones [Thu, 20 Mar 2014 09:20:42 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Search for preferred FSM message sequence configurations

Here we provide a means to traverse though all supplied FSM message
sequence configurations and pick one based on our chip's capabilities.
The first one we match will be the preferred one, as they are
presented in order of preference.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Dynamically setup flash device based on JEDEC ID
Lee Jones [Thu, 20 Mar 2014 09:20:41 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Dynamically setup flash device based on JEDEC ID

Using previously added infrastructure we can now extract a device's JEDEC
ID, compare it to a list of known and supported devices and make assumptions
based on known characteristics of a given chip.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Provide device look-up table
Lee Jones [Thu, 20 Mar 2014 09:20:40 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Provide device look-up table

Supply a lookup table of all the devices we intend to support. This table
is used to store device information such as; a human readable device name,
their JEDEC ID (plus the extended version), sector size and amount, a bit
store of a device's capabilities, its maximum running frequency and
possible use of a per-device configuration call-back.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: devices: Provide header for shared OPCODEs and SFDP commands
Lee Jones [Thu, 20 Mar 2014 09:20:39 +0000 (09:20 +0000)]
mtd: devices: Provide header for shared OPCODEs and SFDP commands

JEDEC have helped to standardise a great deal of the commands which
can be issued to a Serial Flash devices. Many of the Serial Flash
Discoverable Parameters (SFDP) commands are generic across devices.
This patch provides a shared point where these commands can be
defined.

Suggested-by: Mark Brown <broonie@kernel.org>
Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Add support for JEDEC ID extraction
Lee Jones [Thu, 20 Mar 2014 09:20:38 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Add support for JEDEC ID extraction

Once we start supporting devices it will be handy go detect them
dynamically. This will be done using the chip's unique JEDEC ID. This
patch allows us to extract a device's JEDEC ID using the a predefined
FSM register write sequence.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Supply a method to read from the FSM's FIFO
Lee Jones [Thu, 20 Mar 2014 09:20:37 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Supply a method to read from the FSM's FIFO

When invoked the driver will attempt to read any available data from
the FSM's data register. Any data collected from this FIFO would have
originated from the flash chip.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Supply framework for device requests
Lee Jones [Thu, 20 Mar 2014 09:20:36 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Supply framework for device requests

The FSM hardware works by setting a predetermined sequence of register
writes. Rather than open coding them inside each functional block we're
going to define them in a series of formatted 'sequence structures'.
This patch provides the framework which shall be used for every action.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Initialise and configure the FSM for normal working conditions
Lee Jones [Thu, 20 Mar 2014 09:20:35 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Initialise and configure the FSM for normal working conditions

This patch uses default values to initialise a connected flash chip. This
includes; a device soft reset, setting of a safe working frequency, a
switch into Fast Sequencing Mode, configuring of timing data and a purge
of the FIFO.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Supply all register address and bit logic defines
Lee Jones [Thu, 20 Mar 2014 09:20:34 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Supply all register address and bit logic defines

Here we provide the FSM's register addresses, register bit names/offsets
and some commands which will prove useful as we start bulk the FMS's
driver out with functionality.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: st_spi_fsm: Allocate resources and register with MTD framework
Lee Jones [Thu, 20 Mar 2014 09:20:33 +0000 (09:20 +0000)]
mtd: st_spi_fsm: Allocate resources and register with MTD framework

This is a new driver. It's used to communicate with a special type of
optimised Serial Flash Controller called the FSM. The FSM uses a subset
of the SPI protocol to communicate with supported NOR-Flash devices.

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: remove is_elm_present flag
Pekon Gupta [Mon, 3 Mar 2014 10:08:33 +0000 (15:38 +0530)]
mtd: nand: omap: remove is_elm_present flag

'is_elm_present' flag is not used anywhere. This check is implicitely
taken care while selecting appropriate ecc-scheme via DT or board-file.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.hwctl: clean omap_enable_hwecc_bch for redundant ECC configs
Pekon Gupta [Mon, 3 Mar 2014 10:08:32 +0000 (15:38 +0530)]
mtd: nand: omap: ecc.hwctl: clean omap_enable_hwecc_bch for redundant ECC configs

This patch
 - refactors GPMC configurations based on ecc-scheme
 - removed dependency on is_elm_present() flag, which is implicitely
   taken care by selecting appropriate ecc-scheme

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.hwctl: refactor omap_enable_hwecc_bch for ECC related GPMC configs
Pekon Gupta [Mon, 3 Mar 2014 10:08:31 +0000 (15:38 +0530)]
mtd: nand: omap: ecc.hwctl: refactor omap_enable_hwecc_bch for ECC related GPMC configs

Lots of if..then..else conditions in omap_enable_hwecc_bch() can be avoided if
code is refactored based on ecc-scheme.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.hwctl: rename omap3_enable_hwecc_bch to omap_enable_hwecc_bch
Pekon Gupta [Mon, 3 Mar 2014 10:08:30 +0000 (15:38 +0530)]
mtd: nand: omap: ecc.hwctl: rename omap3_enable_hwecc_bch to omap_enable_hwecc_bch

This patch
 - renames omap3_enable_hwecc_bch -> omap_enable_hwecc_bch to keep
   nomenclature independent of any device family.
 - using '__maybe_unused' instead of `ifdef based conditional compilation
   to suppress warning for un-used functions

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch
Pekon Gupta [Wed, 26 Feb 2014 10:23:14 +0000 (15:53 +0530)]
mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch

merge omap3_calculate_ecc_bch8() into omap_calculate_ecc_bch() so that
common callback can be used for both OMAP_ECC_BCH8_CODE_HW and
OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
+---------------------+-------------------------------------------------------+
|ecc-scheme           | nand_chip->calculate() after this patch               |
+---------------------+-------------------------------------------------------+
|HAM1_ECC             | omap_calculate_ecc()                                  |
+---------------------+-------------------------------------------------------+
|BCH4_HW_DETECTION_SW | omap_calculate_ecc_bch()                              |
|BCH4_HW              | omap_calculate_ecc_bch()                              |
|BCH8_HW_DETECTION_SW | omap3_calculate_ecc_bch8() -> omap_calculate_ecc_bch()|
|BCH8_HW              | omap_calculate_ecc_bch()                              |
+---------------------+-------------------------------------------------------+

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch
Pekon Gupta [Wed, 26 Feb 2014 10:23:13 +0000 (15:53 +0530)]
mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch

merges omap3_calculate_ecc_bch4() into omap_calculate_ecc_bch() so that
common callback can be used for both OMAP_ECC_BCH4_CODE_HW and
OMAP_ECC_BCH4_CODE_HW_DETECTION_SW ecc-schemes

+---------------------+-------------------------------------------------------+
|ecc-scheme           | nand_chip->calculate() after this patch               |
+---------------------+-------------------------------------------------------+
|HAM1_ECC             | omap_calculate_ecc()                                  |
+---------------------+-------------------------------------------------------+
|BCH4_HW_DETECTION_SW | omap3_calculate_ecc_bch4() -> omap_calculate_ecc_bch()|
|BCH4_HW              | omap_calculate_ecc_bch()                              |
|BCH8_HW_DETECTION_SW | omap3_calculate_ecc_bch8()                            |
|BCH8_HW              | omap_calculate_ecc_bch()                              |
+---------------------+-------------------------------------------------------+

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.calculate: refactor omap_calculate_ecc_bch for BCHx_HW ecc-scheme
Pekon Gupta [Wed, 26 Feb 2014 10:23:12 +0000 (15:53 +0530)]
mtd: nand: omap: ecc.calculate: refactor omap_calculate_ecc_bch for BCHx_HW ecc-scheme

OMAP NAND driver supports multiple flavours of BCH4 and BCH8 ECC algorithms.
+------+------------------------------------+---------------+---------------+
| Algo | ECC scheme                         |ECC calculation|Error detection|
+------+------------------------------------+---------------+---------------+
|      |OMAP_ECC_BCH4_CODE_HW_DETECTION_SW  |H/W (GPMC)     |S/W            |
| BCH4 |OMAP_ECC_BCH4_CODE_HW               |H/W (GPMC)     |H/W (ELM)      |
+------+------------------------------------+---------------+---------------+
|      |OMAP_ECC_BCH8_CODE_HW_DETECTION_SW  |H/W (GPMC)     |S/W            |
| BCH8 |OMAP_ECC_BCH8_CODE_HW               |H/W (GPMC)     |H/W (ELM)      |
+------+------------------------------------+---------------+---------------+

This patch refactors omap_calculate_ecc_bch() so that
 - separate out ecc-scheme specific code so that common-code can be reused
   between different implementations of same ECC algorithm.
 - new ecc-schemes can be added with ease in future.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.calculate: rename omap3_calculate_ecc_bch to omap_calculate_ecc_bch
Pekon Gupta [Wed, 26 Feb 2014 10:23:11 +0000 (15:53 +0530)]
mtd: nand: omap: ecc.calculate: rename omap3_calculate_ecc_bch to omap_calculate_ecc_bch

rename omap3_calculate_ecc_bch -> omap_calculate_ecc_bch to
keep nomenclature independent of any device family.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.correct: omap_elm_correct_data: fix programmed-page bit-flip...
Pekon Gupta [Tue, 18 Mar 2014 13:26:46 +0000 (18:56 +0530)]
mtd: nand: omap: ecc.correct: omap_elm_correct_data: fix programmed-page bit-flip correction logic

This patch updates following checks when bit-flips are detected by ELM:

 - Do not evaluate bit-flips when un-correctable bit-flips is reported by ELM,
   because as per [1] when ELM reports an un-correctable bit-flips,
   'number of error' field in its ELM_LOCATION_STATUS register is also invalid.

 - Return with error-code '-EBADMSG' on detection of un-correctable bit-flip.

 - Return with error-code '-EBADMSG' when bit-flips position is outside current
   Sector and OOB area.

[1] ELM IP spec Table-25 ELM_LOCATION_STATUS Register.
    ELM_LOCATION_STATUS[8] = ECC_CORRECTABLE: Error location process exit status
        0x0: ECC error location process failed.
             Number of errors and error locations are invalid.
        0x1: all errors were successfully located.
             Number of errors and error locations are valid.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.correct: omap_elm_correct_data: cleanup for future enhancements
Pekon Gupta [Tue, 18 Mar 2014 13:26:45 +0000 (18:56 +0530)]
mtd: nand: omap: ecc.correct: omap_elm_correct_data: cleanup for future enhancements

Current omap_elm_correct_data() code is not scalable for future ecc-schemes
due to presence of tweaks and hard-coded macros for BCH4_ECC and BCH8_ECC
ecc-schemes at multiple places.

This patch:
 - replaces 'ecc_opt' with '(info->nand.ecc.strength == BCH8_MAX_ERROR)
   used to differentiate between BCH8_HW and BCH4_SW
 - replaces macros (defining magic number for specific ecc-scheme) with
   generic variables
 - removes dependency on macros defined in elm.h (like BCHx_ECC_OOB_BYTES)

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.correct: omap_elm_correct_data: fix erased-page detection for...
Pekon Gupta [Tue, 18 Mar 2014 13:26:44 +0000 (18:56 +0530)]
mtd: nand: omap: ecc.correct: omap_elm_correct_data: fix erased-page detection for BCHx_HW ECC schemes

As erased-pages do not have ECC stored in their OOB area, so they need to be
seperated out from programmed-pages, before doing BCH ECC correction.

In current implementation of omap_elm_correct_data() which does ECC correction
for BCHx ECC schemes, this erased-pages are detected based on specific marker
byte (reserved as 0x00) in ecc-layout.
However, this approach has some limitation like;
 1) All ecc-scheme layouts do not have such Reserved byte marker to
    differentiate between erased-page v/s programmed-page. Thus this is a
    customized solution.
 2) Reserved marker byte can itself be subjected to bit-flips causing
    erased-page to be misunderstood as programmed-page.

This patch removes dependency on any marker byte in ecc-layout, instead it
compares calc_ecc[] with pattern of ECC-of-all(0xff). This implicitely
means that both 'data + oob == all(0xff).

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: ecc.correct: omap_elm_correct_data: rename ambiguous variable 'eccsi...
Pekon Gupta [Tue, 18 Mar 2014 13:26:43 +0000 (18:56 +0530)]
mtd: nand: omap: ecc.correct: omap_elm_correct_data: rename ambiguous variable 'eccsize' and 'ecc_vector_size'

renaming following variables as they cause confusion due to resemblence to
another similar field in 'struct nand_ecc_ctrl' (nand_chip->ecc.size).
renaming: ecc_vector_size --> ecc->bytes (info->nand.ecc.bytes)
renaming: eccsize         --> actual_eccbytes (info->nand.ecc.bytes - 1) for BCH4 and BCH8

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: omap: add field to indicate current ecc-scheme in 'struct omap_nand_info'
Pekon Gupta [Tue, 18 Mar 2014 13:26:42 +0000 (18:56 +0530)]
mtd: nand: omap: add field to indicate current ecc-scheme in 'struct omap_nand_info'

Information of currently selected ECC scheme 'enum omap_ecc ecc_opt' should
available outside platform-data, so that single nand_chip->ecc callback can
support multiple ecc-scheme configurations.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: Fix the behavior of OTP write if there is not enough room for data
Christian Riesch [Thu, 6 Mar 2014 11:42:37 +0000 (12:42 +0100)]
mtd: Fix the behavior of OTP write if there is not enough room for data

If a write to one time programmable memory (OTP) hits the end of this
memory area, no more data can be written. The count variable in
mtdchar_write() in drivers/mtd/mtdchar.c is not decreased anymore.
We are trapped in the loop forever, mtdchar_write() will never return
in this case.

The desired behavior of a write in such a case is described in [1]:
- Try to write as much data as possible, truncate the write to fit into
  the available memory and return the number of bytes that actually
  have been written.
- If no data could be written at all, return -ENOSPC.

This patch fixes the behavior of OTP write if there is not enough space
for all data:

1) mtd_write_user_prot_reg() in drivers/mtd/mtdcore.c is modified to
   return -ENOSPC if no data could be written at all.
2) mtdchar_write() is modified to handle -ENOSPC correctly. Exit if a
   write returned -ENOSPC and yield the correct return value, either
   then number of bytes that could be written, or -ENOSPC, if no data
   could be written at all.

Furthermore the patch harmonizes the behavior of the OTP memory write
in drivers/mtd/devices/mtd_dataflash.c with the other implementations
and the requirements from [1]. Instead of returning -EINVAL if the data
does not fit into the OTP memory, we try to write as much data as
possible/truncate the write.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: block2mtd: check device size
Fabian Frederick [Thu, 6 Mar 2014 10:04:22 +0000 (18:04 +0800)]
mtd: block2mtd: check device size

fixme applied : check device size is a multiple of erasesize.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: atmel_nand: Disable subpage NAND write when using Atmel PMECC
Herve Codina [Mon, 3 Mar 2014 11:15:29 +0000 (12:15 +0100)]
mtd: atmel_nand: Disable subpage NAND write when using Atmel PMECC

Crash detected on sam5d35 and its pmecc nand ecc controller.

The problem was a call to chip->ecc.hwctl from nand_write_subpage_hwecc
(nand_base.c) when we write a sub page.
chip->ecc.hwctl function is not set when we are using PMECC controller.
As a workaround, set NAND_NO_SUBPAGE_WRITE for PMECC controller in
order to disable sub page access in nand_write_page.

Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Acked-by: Josh Wu <josh.wu@atmel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: gpmi: add subpage read support
Huang Shijie [Fri, 3 Jan 2014 03:01:42 +0000 (11:01 +0800)]
mtd: gpmi: add subpage read support

1) Why add the subpage read support?
  The page size of the nand chip becomes larger and larger, the imx6 has to
  supports the 16K page or even bigger page. But sometimes, the upper layer only
  needs a small part of the page, such as 512 bytes or less.

  For example, ubiattach may only read 64 bytes per page.

2) We only enable the subpage read support when it meets the conditions:
   <1> the chip is imx6 (or later chips) which can supports large nand page.
   <2> the size of ECC parity is byte aligned.
       If the size of ECC parity is not byte aligned, the calling of NAND_CMD_RNDOUT
       will fail.

3) What does this patch do?
   This patch will fake a virtual small page for the subpage read, and call the
   gpmi_ecc_read_page() to do the real work.

   In order to fake a virtual small page, the patch changes the BCH registers and
   the bch_geometry{}. After the subpage read finished, we will restore them back.

4) Performace:
    4.1) Tested with Toshiba TC58NVG2S0F(4096 + 224) with the following command:
         #ubiattach /dev/ubi_ctrl -m 4

       The detail information of /dev/mtd4 shows below:
       --------------------------------------------------------------
       #mtdinfo /dev/mtd4
        mtd4
        Name:                           test
        Type:                           nand
        Eraseblock size:                262144 bytes, 256.0 KiB
        Amount of eraseblocks:          1856 (486539264 bytes, 464.0 MiB)
        Minimum input/output unit size: 4096 bytes
        Sub-page size:                  4096 bytes
        OOB size:                       224 bytes
        Character device major/minor:   90:8
        Bad blocks are allowed:         true
        Device is writable:             true
       --------------------------------------------------------------

    4.2) Before this patch:
       --------------------------------------------------------------
       [   94.530495] UBI: attaching mtd4 to ubi0
       [   98.928850] UBI: scanning is finished
       [   98.953594] UBI: attached mtd4 (name "test", size 464 MiB) to ubi0
       [   98.958562] UBI: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
       [   98.964076] UBI: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
       [   98.969518] UBI: VID header offset: 4096 (aligned 4096), data offset: 8192
       [   98.975128] UBI: good PEBs: 1856, bad PEBs: 0, corrupted PEBs: 0
       [   98.979843] UBI: user volume: 1, internal volumes: 1, max. volumes count: 128
       [   98.985878] UBI: max/mean erase counter: 2/1, WL threshold: 4096, image sequence number: 2024916145
       [   98.993635] UBI: available PEBs: 0, total reserved PEBs: 1856, PEBs reserved for bad PEB handling: 40
       [   99.001807] UBI: background thread "ubi_bgt0d" started, PID 831
       --------------------------------------------------------------
       The attach time is about 98.9 - 94.5 = 4.4s

    4.3) After this patch:
       --------------------------------------------------------------
       [  286.464906] UBI: attaching mtd4 to ubi0
       [  289.186129] UBI: scanning is finished
       [  289.211416] UBI: attached mtd4 (name "test", size 464 MiB) to ubi0
       [  289.216360] UBI: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
       [  289.221858] UBI: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
       [  289.227293] UBI: VID header offset: 4096 (aligned 4096), data offset: 8192
       [  289.232878] UBI: good PEBs: 1856, bad PEBs: 0, corrupted PEBs: 0
       [  289.237628] UBI: user volume: 0, internal volumes: 1, max. volumes count: 128
       [  289.243553] UBI: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 2024916145
       [  289.251348] UBI: available PEBs: 1812, total reserved PEBs: 44, PEBs reserved for bad PEB handling: 40
       [  289.259417] UBI: background thread "ubi_bgt0d" started, PID 847
       --------------------------------------------------------------
       The attach time is about 289.18 - 286.46 = 2.7s

     4.4) The conclusion:
       We achieve (4.4 - 2.7) / 4.4 = 38.6% faster in the ubiattach.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: gpmi: do not use the mtd->writesize
Huang Shijie [Fri, 3 Jan 2014 03:01:41 +0000 (11:01 +0800)]
mtd: gpmi: do not use the mtd->writesize

The nfc_geo->payload_size is equal to the mtd->writesize now,
use the nfc_geo->payload_size to replace the mtd->writesize.

This patch makes preparation for the gpmi's subpage read support.
In the subpage support, the nfc_geo->payload_size maybe smaller then
the mtd->writesize.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: add "page" argument for read_subpage hook
Huang Shijie [Fri, 3 Jan 2014 03:01:40 +0000 (11:01 +0800)]
mtd: nand: add "page" argument for read_subpage hook

Add the "page" argument for the read_subpage hook. With this argument,
the implementation of this hook could prints out more accurate information
for debugging.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: remove unused function input parameter
Cai Zhiyong [Wed, 25 Dec 2013 12:11:15 +0000 (20:11 +0800)]
mtd: nand: remove unused function input parameter

The nand_get_flash_type parameter "busw" input value is not used by any
branch, and it is updated before use it in the function, so remove it,
define the "busw" as an internal variable.

Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: pxa3xx: Print actual ECC strength in error message
Ezequiel Garcia [Thu, 27 Feb 2014 17:13:26 +0000 (14:13 -0300)]
mtd: nand: pxa3xx: Print actual ECC strength in error message

The actual ECC strength used to select the ECC scheme is 'ecc_strength'.
Use it in the error message.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: pxa3xx: Remove unused macro
Ezequiel Garcia [Thu, 27 Feb 2014 17:13:25 +0000 (14:13 -0300)]
mtd: nand: pxa3xx: Remove unused macro

This macro is not used so it's safe to remove it.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X
Rafał Miłecki [Fri, 28 Feb 2014 17:02:01 +0000 (18:02 +0100)]
mtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X

Home routers based on SoCs like BCM53010 (AKA BCM4708) use flashes
which can be nicely partitioned with bcm47xxpart. Header bcm47xx_nvram.h
is not available on bcm53xx, so don't include it.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: bcm47xxpart: avoid overflowing when registering trx
Rafał Miłecki [Wed, 26 Feb 2014 13:30:34 +0000 (14:30 +0100)]
mtd: bcm47xxpart: avoid overflowing when registering trx

Our code parsing "trx" header registers few partitions at once (in one
loop iteration). Add extra check in that place.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: bcm47xxpart: fix off by one in partitions limit
Rafał Miłecki [Wed, 26 Feb 2014 13:02:06 +0000 (14:02 +0100)]
mtd: bcm47xxpart: fix off by one in partitions limit

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: allow CONFIG_MTD_PHYSMAP_OF also for CONFIG_MTD_RAM
Philippe De Muyter [Wed, 5 Mar 2014 23:00:00 +0000 (00:00 +0100)]
mtd: allow CONFIG_MTD_PHYSMAP_OF also for CONFIG_MTD_RAM

Up to now mtd-ram devices described in device trees were only accessible
if mtd-flash or mtd-rom were also configured at linux configuration
time, because MTD_PHYSMAP_OF was only available if (MTD_CFI ||
MTD_JEDECPROBE || MTD_ROM).  Allow MTD_PHYSMAP_OF selection also
when only MTD_RAM is set.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: m25p80: add Macronix mx66l1g55g 1Gbit SPI flash
Brian Norris [Wed, 29 Jan 2014 21:39:43 +0000 (13:39 -0800)]
mtd: m25p80: add Macronix mx66l1g55g 1Gbit SPI flash

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
10 years agomtd: nand: Add a devicetree binding for ECC strength and ECC step size
Ezequiel Garcia [Mon, 24 Feb 2014 22:24:49 +0000 (19:24 -0300)]
mtd: nand: Add a devicetree binding for ECC strength and ECC step size

Some flashes can only be properly accessed when the ECC mode is
specified, so a way to describe such mode is required.

Together, the ECC strength and step size define the correction capability,
so that we say we will correct "{strength} bit errors per {size} bytes".

The interpretation of these parameters is implementation-defined, but they
often have ramifications on the formation, interpretation, and placement of
correction metadata on the flash. Not all implementations must support all
possible combinations. Implementations are encouraged to further define the
value(s) they support.

Acked-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agoof_mtd: Add helpers to get ECC strength and ECC step size
Ezequiel Garcia [Mon, 24 Feb 2014 22:24:48 +0000 (19:24 -0300)]
of_mtd: Add helpers to get ECC strength and ECC step size

This commit adds simple helpers to obtain the devicetree properties
that specify the ECC strength and ECC step size to use on a given
NAND controller.

Acked-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: Add a retlen parameter to _get_{fact,user}_prot_info
Christian Riesch [Tue, 28 Jan 2014 08:29:44 +0000 (09:29 +0100)]
mtd: Add a retlen parameter to _get_{fact,user}_prot_info

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agojffs2: Fix crash due to truncation of csize
Ajesh Kunhipurayil Vijayan [Mon, 6 Jan 2014 13:36:55 +0000 (19:06 +0530)]
jffs2: Fix crash due to truncation of csize

mounting JFFS2 partition sometimes crashes with this call trace:

[ 1322.240000] Kernel bug detected[#1]:
[ 1322.244000] Cpu 2
[ 1322.244000] $ 0   : 0000000000000000 0000000000000018 000000003ff00070 0000000000000001
[ 1322.252000] $ 4   : 0000000000000000 c0000000f3980150 0000000000000000 0000000000010000
[ 1322.260000] $ 8   : ffffffffc09cd5f8 0000000000000001 0000000000000088 c0000000ed300de8
[ 1322.268000] $12   : e5e19d9c5f613a45 ffffffffc046d464 0000000000000000 66227ba5ea67b74e
[ 1322.276000] $16   : c0000000f1769c00 c0000000ed1e0200 c0000000f3980150 0000000000000000
[ 1322.284000] $20   : c0000000f3a80000 00000000fffffffc c0000000ed2cfbd8 c0000000f39818f0
[ 1322.292000] $24   : 0000000000000004 0000000000000000
[ 1322.300000] $28   : c0000000ed2c0000 c0000000ed2cfab8 0000000000010000 ffffffffc039c0b0
[ 1322.308000] Hi    : 000000000000023c
[ 1322.312000] Lo    : 000000000003f802
[ 1322.316000] epc   : ffffffffc039a9f8 check_tn_node+0x88/0x3b0
[ 1322.320000]     Not tainted
[ 1322.324000] ra    : ffffffffc039c0b0 jffs2_do_read_inode_internal+0x1250/0x1e48
[ 1322.332000] Status: 5400f8e3    KX SX UX KERNEL EXL IE
[ 1322.336000] Cause : 00800034
[ 1322.340000] PrId  : 000c1004 (Netlogic XLP)
[ 1322.344000] Modules linked in:
[ 1322.348000] Process jffs2_gcd_mtd7 (pid: 264, threadinfo=c0000000ed2c0000, task=c0000000f0e68dd8, tls=0000000000000000)
[ 1322.356000] Stack : c0000000f1769e30 c0000000ed010780 c0000000ed010780 c0000000ed300000
        c0000000f1769c00 c0000000f3980150 c0000000f3a80000 00000000fffffffc
        c0000000ed2cfbd8 ffffffffc039c0b0 ffffffffc09c6340 0000000000001000
        0000000000000dec ffffffffc016c9d8 c0000000f39805a0 c0000000f3980180
        0000008600000000 0000000000000000 0000000000000000 0000000000000000
        0001000000000dec c0000000f1769d98 c0000000ed2cfb18 0000000000010000
        0000000000010000 0000000000000044 c0000000f3a80000 c0000000f1769c00
        c0000000f3d207a8 c0000000f1769d98 c0000000f1769de0 ffffffffc076f9c0
        0000000000000009 0000000000000000 0000000000000000 ffffffffc039cf90
        0000000000000017 ffffffffc013fbdc 0000000000000001 000000010003e61c
        ...
[ 1322.424000] Call Trace:
[ 1322.428000] [<ffffffffc039a9f8>] check_tn_node+0x88/0x3b0
[ 1322.432000] [<ffffffffc039c0b0>] jffs2_do_read_inode_internal+0x1250/0x1e48
[ 1322.440000] [<ffffffffc039cf90>] jffs2_do_crccheck_inode+0x70/0xd0
[ 1322.448000] [<ffffffffc03a1b80>] jffs2_garbage_collect_pass+0x160/0x870
[ 1322.452000] [<ffffffffc03a392c>] jffs2_garbage_collect_thread+0xdc/0x1f0
[ 1322.460000] [<ffffffffc01541c8>] kthread+0xb8/0xc0
[ 1322.464000] [<ffffffffc0106d18>] kernel_thread_helper+0x10/0x18
[ 1322.472000]
[ 1322.472000]
Code: 67bd0050  94a4002c  2c830001 <00038036de050218  2403fffc  0080a82d  00431824  24630044
[ 1322.480000] ---[ end trace b052bb90e97dfbf5 ]---

The variable csize in structure jffs2_tmp_dnode_info is of type uint16_t, but it
is used to hold the compressed data length(csize) which is declared as uint32_t.
So, when the value of csize exceeds 16bits, it gets truncated when assigned to
tn->csize. This is causing a kernel BUG.
Changing the definition of csize in jffs2_tmp_dnode_info to uint32_t fixes the issue.

Signed-off-by: Ajesh Kunhipurayil Vijayan <ajesh@broadcom.com>
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agojffs2: Fix segmentation fault found in stress test
Kamlakant Patel [Mon, 6 Jan 2014 13:36:54 +0000 (19:06 +0530)]
jffs2: Fix segmentation fault found in stress test

Creating a large file on a JFFS2 partition sometimes crashes with this call
trace:

[  306.476000] CPU 13 Unable to handle kernel paging request at virtual address c0000000dfff8002, epc == ffffffffc03a80a8, ra == ffffffffc03a8044
[  306.488000] Oops[#1]:
[  306.488000] Cpu 13
[  306.492000] $ 0   : 0000000000000000 0000000000000000 0000000000008008 0000000000008007
[  306.500000] $ 4   : c0000000dfff8002 000000000000009f c0000000e0007cde c0000000ee95fa58
[  306.508000] $ 8   : 0000000000000001 0000000000008008 0000000000010000 ffffffffffff8002
[  306.516000] $12   : 0000000000007fa9 000000000000ff0e 000000000000ff0f 80e55930aebb92bb
[  306.524000] $16   : c0000000e0000000 c0000000ee95fa5c c0000000efc80000 ffffffffc09edd70
[  306.532000] $20   : ffffffffc2b60000 c0000000ee95fa58 0000000000000000 c0000000efc80000
[  306.540000] $24   : 0000000000000000 0000000000000004
[  306.548000] $28   : c0000000ee950000 c0000000ee95f738 0000000000000000 ffffffffc03a8044
[  306.556000] Hi    : 00000000000574a5
[  306.560000] Lo    : 6193b7a7e903d8c9
[  306.564000] epc   : ffffffffc03a80a8 jffs2_rtime_compress+0x98/0x198
[  306.568000]     Tainted: G        W
[  306.572000] ra    : ffffffffc03a8044 jffs2_rtime_compress+0x34/0x198
[  306.580000] Status: 5000f8e3    KX SX UX KERNEL EXL IE
[  306.584000] Cause : 00800008
[  306.588000] BadVA : c0000000dfff8002
[  306.592000] PrId  : 000c1100 (Netlogic XLP)
[  306.596000] Modules linked in:
[  306.596000] Process dd (pid: 170, threadinfo=c0000000ee950000, task=c0000000ee6e0858, tls=0000000000c47490)
[  306.608000] Stack : 7c547f377ddc7ee4 7ffc7f967f5d7fae 7f617f507fc37ff4 7e7d7f817f487f5f
        7d8e7fec7ee87eb3 7e977ff27eec7f9e 7d677ec67f917f67 7f3d7e457f017ed7
        7fd37f517f867eb2 7fed7fd17ca57e1d 7e5f7fe87f257f77 7fd77f0d7ede7fdb
        7fba7fef7e197f99 7fde7fe07ee37eb5 7f5c7f8c7fc67f65 7f457fb87f847e93
        7f737f3e7d137cd9 7f8e7e9c7fc47d25 7dbb7fac7fb67e52 7ff17f627da97f64
        7f6b7df77ffa7ec5 80057ef17f357fb3 7f767fa27dfc7fd5 7fe37e8e7fd07e53
        7e227fcf7efb7fa1 7f547e787fa87fcc 7fcb7fc57f5a7ffb 7fc07f6c7ea97e80
        7e2d7ed17e587ee0 7fb17f9d7feb7f31 7f607e797e887faa 7f757fdd7c607ff3
        7e877e657ef37fbd 7ec17fd67fe67ff7 7ff67f797ff87dc4 7eef7f3a7c337fa6
        7fe57fc97ed87f4b 7ebe7f097f0b8003 7fe97e2a7d997cba 7f587f987f3c7fa9
        ...
[  306.676000] Call Trace:
[  306.680000] [<ffffffffc03a80a8>] jffs2_rtime_compress+0x98/0x198
[  306.684000] [<ffffffffc0394f10>] jffs2_selected_compress+0x110/0x230
[  306.692000] [<ffffffffc039508c>] jffs2_compress+0x5c/0x388
[  306.696000] [<ffffffffc039dc58>] jffs2_write_inode_range+0xd8/0x388
[  306.704000] [<ffffffffc03971bc>] jffs2_write_end+0x16c/0x2d0
[  306.708000] [<ffffffffc01d3d90>] generic_file_buffered_write+0xf8/0x2b8
[  306.716000] [<ffffffffc01d4e7c>] __generic_file_aio_write+0x1ac/0x350
[  306.720000] [<ffffffffc01d50a0>] generic_file_aio_write+0x80/0x168
[  306.728000] [<ffffffffc021f7dc>] do_sync_write+0x94/0xf8
[  306.732000] [<ffffffffc021ff6c>] vfs_write+0xa4/0x1a0
[  306.736000] [<ffffffffc02202e8>] SyS_write+0x50/0x90
[  306.744000] [<ffffffffc0116cc0>] handle_sys+0x180/0x1a0
[  306.748000]
[  306.748000]
Code: 020b202d  0205282d  90a50000 <9084000014a40038  00000000  0060602d  0000282d  016c5823
[  306.760000] ---[ end trace 79dd088435be02d0 ]---
Segmentation fault

This crash is caused because the 'positions' is declared as an array of signed
short. The value of position is in the range 0..65535, and will be converted
to a negative number when the position is greater than 32767 and causes a
corruption and crash. Changing the definition to 'unsigned short' fixes this
issue

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agojffs2: unlock f->sem on error in jffs2_new_inode()
Wang Guoli [Wed, 12 Feb 2014 20:44:54 +0000 (12:44 -0800)]
jffs2: unlock f->sem on error in jffs2_new_inode()

If jffs2_new_inode() succeeds, it returns with f->sem held, and the caller
is responsible for releasing the lock.  If it fails, it still returns with
the lock held, but the caller won't release the lock, which will lead to
deadlock.

Fix it by releasing the lock in jffs2_new_inode() on error.

Signed-off-by: Wang Guoli <andy.wangguoli@huawei.com>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Wang Guoli <andy.wangguoli@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[Brian: not marked for stable; no one observed deadlock, and I don't
        think it can happen here]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agojffs2: avoid soft-lockup in jffs2_reserve_space_gc()
Li Zefan [Wed, 12 Feb 2014 20:44:56 +0000 (12:44 -0800)]
jffs2: avoid soft-lockup in jffs2_reserve_space_gc()

We triggered soft-lockup under stress test on 2.6.34 kernel.

BUG: soft lockup - CPU#1 stuck for 60009ms! [lockf2.test:14488]
...
[<bf09a4d4>] (jffs2_do_reserve_space+0x420/0x440 [jffs2])
[<bf09a528>] (jffs2_reserve_space_gc+0x34/0x78 [jffs2])
[<bf0a1350>] (jffs2_garbage_collect_dnode.isra.3+0x264/0x478 [jffs2])
[<bf0a2078>] (jffs2_garbage_collect_pass+0x9c0/0xe4c [jffs2])
[<bf09a670>] (jffs2_reserve_space+0x104/0x2a8 [jffs2])
[<bf09dc48>] (jffs2_write_inode_range+0x5c/0x4d4 [jffs2])
[<bf097d8c>] (jffs2_write_end+0x198/0x2c0 [jffs2])
[<c00e00a4>] (generic_file_buffered_write+0x158/0x200)
[<c00e14f4>] (__generic_file_aio_write+0x3a4/0x414)
[<c00e15c0>] (generic_file_aio_write+0x5c/0xbc)
[<c012334c>] (do_sync_write+0x98/0xd4)
[<c0123a84>] (vfs_write+0xa8/0x150)
[<c0123d74>] (sys_write+0x3c/0xc0)]

Fix this by adding a cond_resched() in the while loop.

[akpm@linux-foundation.org: don't initialize `ret']
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agojffs2: remove from wait queue after schedule()
Li Zefan [Wed, 12 Feb 2014 20:44:57 +0000 (12:44 -0800)]
jffs2: remove from wait queue after schedule()

@wait is a local variable, so if we don't remove it from the wait queue
list, later wake_up() may end up accessing invalid memory.

This was spotted by eyes.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: ts5500: Add dependency
Jean Delvare [Sun, 23 Feb 2014 09:32:01 +0000 (10:32 +0100)]
mtd: ts5500: Add dependency

There is no point in displaying the TS5500-specific driver entries if
TS5500 board support itself isn't enabled.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nuc900_nand: NULL dereference in nuc900_nand_enable()
Dan Carpenter [Mon, 17 Feb 2014 20:03:08 +0000 (23:03 +0300)]
mtd: nuc900_nand: NULL dereference in nuc900_nand_enable()

Instead of writing to "nand->reg + REG_FMICSR" we write to "REG_FMICSR"
which is NULL and not a valid register.

Fixes: 8bff82cbc308 ('mtd: add nand support for w90p910 (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: print out the right information for JEDEC compliant NAND
Huang Shijie [Fri, 21 Feb 2014 05:39:41 +0000 (13:39 +0800)]
mtd: nand: print out the right information for JEDEC compliant NAND

Check the chip->jedec_version, and print out the right information
for JEDEC compliant NAND.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: parse out the JEDEC compliant NAND
Huang Shijie [Fri, 21 Feb 2014 05:39:40 +0000 (13:39 +0800)]
mtd: nand: parse out the JEDEC compliant NAND

This patch adds the parsing code for the JEDEC compliant NAND.

Since we need the 0x40 as the column address, this patch also
makes the NAND_CMD_PARAM to use the 8-bit address only.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: add a helper to get the supported features for JEDEC
Huang Shijie [Fri, 21 Feb 2014 05:39:39 +0000 (13:39 +0800)]
mtd: nand: add a helper to get the supported features for JEDEC

Add a helper to get the supported features for JEDEC compliant NAND.
Also add a macro JEDEC_FEATURE_16_BIT_BUS.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: add fields for JEDEC in nand_chip
Huang Shijie [Fri, 21 Feb 2014 05:39:38 +0000 (13:39 +0800)]
mtd: nand: add fields for JEDEC in nand_chip

Add the jedec_version field, and add an anonymous union which
contains the nand_onfi_params and nand_jedec_params.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: add the data structures for JEDEC parameter page
Huang Shijie [Fri, 21 Feb 2014 05:39:37 +0000 (13:39 +0800)]
mtd: nand: add the data structures for JEDEC parameter page

Create the nand_jedec_params{} and jedec_ecc_info{} according to
the JESD230A (Revision of JESD230, October 2012).

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: s3c2410: Trivial cleanup in header file
Sachin Kamat [Fri, 14 Feb 2014 06:46:38 +0000 (12:16 +0530)]
mtd: nand: s3c2410: Trivial cleanup in header file

Commit 436d42c61c3e ("ARM: samsung: move platform_data definitions")
moved the files to the current location but forgot to remove the pointer
to its previous location. Clean it up. While at it also add the header
file protection macros appropriately.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: mxc_nand: Propagate the error if platform_get_irq() fails
Fabio Estevam [Fri, 14 Feb 2014 03:09:34 +0000 (01:09 -0200)]
mtd: mxc_nand: Propagate the error if platform_get_irq() fails

Check the return value from platform_get_irq() and propagate it in the case of
error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: remove some duplicative checks
Dan Carpenter [Thu, 13 Feb 2014 11:21:44 +0000 (14:21 +0300)]
mtd: remove some duplicative checks

"rc" is an error code here, no need to check it a second time.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: atmel_nand: change log level
Nicolas Ferre [Wed, 12 Feb 2014 11:26:54 +0000 (12:26 +0100)]
mtd: atmel_nand: change log level

PIO fall back is not an issue, so don't make this much noise.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: m25p80: add support for the Spansion s25fl008k chip
Kuninori Morimoto [Tue, 11 Feb 2014 08:51:18 +0000 (09:51 +0100)]
mtd: m25p80: add support for the Spansion s25fl008k chip

Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: gen_probe: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:20:31 +0000 (15:20 +0900)]
mtd: gen_probe: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: cfi: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:19:35 +0000 (15:19 +0900)]
mtd: cfi: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: onenand: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:15:38 +0000 (15:15 +0900)]
mtd: onenand: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: lpddr: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:14:33 +0000 (15:14 +0900)]
mtd: lpddr: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: plat-ram: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:12:15 +0000 (15:12 +0900)]
mtd: plat-ram: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: pmc551: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:11:09 +0000 (15:11 +0900)]
mtd: pmc551: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: spear_smi: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:10:10 +0000 (15:10 +0900)]
mtd: spear_smi: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: devices: elm: Remove unnecessary OOM messages
Jingoo Han [Thu, 6 Feb 2014 06:08:53 +0000 (15:08 +0900)]
mtd: devices: elm: Remove unnecessary OOM messages

The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: elm: Use correct check on return value of pm_runtime_get_sync
Stefan Sørensen [Mon, 3 Feb 2014 14:54:09 +0000 (15:54 +0100)]
mtd: elm: Use correct check on return value of pm_runtime_get_sync

The ELM driver incorrectly reagard any non-zero return value from
pm_runtime_get_sync as an error, but it may return 1 if the device
was already active. Fix to only error when return value is negative.

Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: fix erroneous read_buf call in nand_write_page_raw_syndrome
Boris BREZILLON [Sat, 1 Feb 2014 18:10:28 +0000 (19:10 +0100)]
mtd: nand: fix erroneous read_buf call in nand_write_page_raw_syndrome

read_buf is called in place of write_buf in the
nand_write_page_raw_syndrome function.

Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: flctl: Add dependency on HAS_IOMEM and HAS_DMA
Richard Weinberger [Fri, 31 Jan 2014 12:39:07 +0000 (13:39 +0100)]
mtd: nand: flctl: Add dependency on HAS_IOMEM and HAS_DMA

On archs like S390 or um this driver cannot build nor work.
Make it depend on HAS_IOMEM and HAS_DMA to bypass build failures.

drivers/built-in.o: In function `flctl_probe':
drivers/mtd/nand/sh_flctl.c:1097: undefined reference to `devm_ioremap_resource'
drivers/built-in.o: In function `flctl_dma_fifo0_transfer':
drivers/mtd/nand/sh_flctl.c:368: undefined reference to `dma_map_single'
drivers/mtd/nand/sh_flctl.c:407: undefined reference to `dma_unmap_single'

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: m25p80: Use positive logic to check JEDEC ID
Axel Lin [Tue, 21 Jan 2014 07:56:34 +0000 (15:56 +0800)]
mtd: m25p80: Use positive logic to check JEDEC ID

For slightly better readability.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: don't use read_buf for 8-bit ONFI transfers
Brian Norris [Sat, 30 Nov 2013 06:04:28 +0000 (22:04 -0800)]
mtd: nand: don't use read_buf for 8-bit ONFI transfers

Use a repeated read_byte() instead of read_buf(), since for x16 buswidth
devices, we need to avoid the upper I/O[16:9] bits. See the following
commit for reference:

commit 05f7835975dad6b3b517f9e23415985e648fb875
Author: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date:   Thu Dec 5 22:22:04 2013 +0100

    mtd: nand: don't use {read,write}_buf for 8-bit transfers

Now, I think that all barriers to probing ONFI on x16 devices are
removed, so remove the check from nand_flash_detect_onfi().

Tested on 8-bit ONFI NAND (Micron MT29F32G08CBADAWP).

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-By: Pekon Gupta <pekon@ti.com>
10 years agomtd: nand: force NAND_CMD_READID onto 8-bit bus
Brian Norris [Wed, 29 Jan 2014 22:08:12 +0000 (14:08 -0800)]
mtd: nand: force NAND_CMD_READID onto 8-bit bus

The NAND command helpers tend to automatically shift the column address
for x16 bus devices, since most commands expect a word address, not a
byte address. The Read ID command, however, expects an 8-bit address
(i.e., 0x00, 0x20, or 0x40 should not be translated to 0x00, 0x10, or
0x20).

This fixes the column address for a few drivers which imitate the
nand_base defaults. Note that I don't touch sh_flctl.c, since it already
handles this problem slightly differently (note its comment "READID is
always performed using an 8-bit bus").

I have not tested this patch, as I only have x8 parts up for testing at
this point. Hopefully that can change soon...

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-By: Pekon Gupta <pekon@ti.com>
10 years agomtd: nand: add support for SanDisk SDTNRGAMA-008G
Huang Shijie [Fri, 3 Jan 2014 05:37:03 +0000 (13:37 +0800)]
mtd: nand: add support for SanDisk SDTNRGAMA-008G

The datasheet does not tell us how to parse out the ID data,
so handle it as a full ID nand.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: remove the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE
Huang Shijie [Fri, 20 Dec 2013 16:02:30 +0000 (00:02 +0800)]
mtd: nand: remove the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE

There is no reference to these two macros now.
Just remove them.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: nand: kill the the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE for nand_buffers{}
Huang Shijie [Mon, 13 Jan 2014 06:27:12 +0000 (14:27 +0800)]
mtd: nand: kill the the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE for nand_buffers{}

The patch converts the arrays to buffer pointers for nand_buffers{}.

The cafe_nand.c is the only NAND_OWN_BUFFERS user which allocates
nand_buffers{} itself.

This patch disables the DMA for nand_scan_ident, and restores the DMA
status after we finish the nand_scan_ident. This way, we can get page
size and OOB size and use them to allocate cafe->dmabuf.

Since the cafe_nand.c uses the NAND_ECC_HW_SYNDROME ECC mode, we do not
allocate the buffers for @ecccalc and @ecccode.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: delete non-required instances of include <linux/init.h>
Paul Gortmaker [Tue, 21 Jan 2014 21:22:52 +0000 (16:22 -0500)]
mtd: delete non-required instances of include <linux/init.h>

None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>.  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
[Brian: dropped one incorrect hunk]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: block2mtd: Add mutex_destroy
Fabian Frederick [Sat, 25 Jan 2014 02:45:08 +0000 (10:45 +0800)]
mtd: block2mtd: Add mutex_destroy

mutex_destroy added on each device in block2mtd_exit and add_device failure

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: phram: Repair multiple instances support
Alexander Sverdlin [Mon, 14 Oct 2013 16:52:23 +0000 (18:52 +0200)]
mtd: phram: Repair multiple instances support

Commit b2a2a84d35e0f42ad26e326ec4258f6a8b8eecbe (mtd: phram: dot not crash when
built-in and passing boot param) claims to be "based on Ville Herva's similar
patch to block2mtd" (c4e7fb313771ac03dfdca26d30e8b721731c562b), but it has
missed the crucial point of the original path: all these "if(n)def MODULE".
It has broken the possibility to create several phram instances when phram is
compiled as module. The possibility to add instances via /sys writes to
/sys/module/phram/parameters/phram was also broken with mentioned patch.
Proposed patch takes the idea of original block2mtd patch to its full extent.
Assumption "This function is always called before 'init_phram()'" was also
incorrect, so removed the comment. This patch effectively reverts also
b11ec57fc6e6d4882ef01a0c09a1dde58f50492e (mtd: phram: fix section mismatch for
phram_setup).

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nsn.com>
[Brian: remove static assigment = 0]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: sm_ftl: heap corruption in sm_create_sysfs_attributes()
Dan Carpenter [Thu, 5 Dec 2013 14:53:50 +0000 (17:53 +0300)]
mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes()

We always put a NUL terminator one space past the end of the "vendor"
buffer.  Walter Harms also pointed out that this should just use
kstrndup().

Fixes: 7d17c02a01a1 ('mtd: Add new SmartMedia/xD FTL')

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: m25p80: Enable Dual SPI read transfers for s25fl256s1 and s25fl512s
Geert Uytterhoeven [Tue, 21 Jan 2014 12:59:19 +0000 (13:59 +0100)]
mtd: m25p80: Enable Dual SPI read transfers for s25fl256s1 and s25fl512s

Spansion s25fl256s1 and s25fl512s support Dual SPI transfers, hence set the
M25P80_DUAL_READ flag.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agomtd: m25p80: Add dual read support
Geert Uytterhoeven [Tue, 21 Jan 2014 12:59:18 +0000 (13:59 +0100)]
mtd: m25p80: Add dual read support

Add support for Dual SPI read transfers, which is supported by some
Spansion SPI FLASHes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
10 years agoLinux 3.14-rc6
Linus Torvalds [Mon, 10 Mar 2014 02:41:57 +0000 (19:41 -0700)]
Linux 3.14-rc6

10 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Mon, 10 Mar 2014 02:27:31 +0000 (19:27 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from from Olof Johansson:
 "A collection of fixes for ARM platforms.  A little large due to us
  missing to do one last week, but there's nothing in particular here
  that is in itself large and scary.

  Mostly a handful of smaller fixes all over the place.  The majority is
  made up of fixes for OMAP, but there are a few for others as well.  In
  particular, there was a decision to rename a binding for the Broadcom
  pinctrl block that we need to go in before the final release since we
  then treat it as ABI"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: dts: omap3-gta04: Add ti,omap36xx to compatible property to avoid problems with booting
  ARM: tegra: add LED options back into tegra_defconfig
  ARM: dts: omap3-igep: fix boot fail due wrong compatible match
  ARM: OMAP3: Fix pinctrl interrupts for core2
  pinctrl: Rename Broadcom Capri pinctrl binding
  pinctrl: refer to updated dt binding string.
  Update dtsi with new pinctrl compatible string
  ARM: OMAP: Kill warning in CPUIDLE code with !CONFIG_SMP
  ARM: OMAP2+: Add support for thumb mode on DT booted N900
  ARM: OMAP2+: clock: fix clkoutx2 with CLK_SET_RATE_PARENT
  ARM: OMAP4: hwmod: Fix SOFTRESET logic for OMAP4
  ARM: DRA7: hwmod data: correct the sysc data for spinlock
  ARM: OMAP5: PRM: Fix reboot handling
  ARM: sunxi: dt: Change the touchscreen compatibles
  ARM: sun7i: dt: Fix interrupt trigger types

10 years agoMerge tag 'nfs-for-3.14-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Mon, 10 Mar 2014 02:17:39 +0000 (19:17 -0700)]
Merge tag 'nfs-for-3.14-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

   - Fix another nfs4_sequence corruptor in RELEASE_LOCKOWNER
   - Fix an Oopsable delegation callback race
   - Fix another bad stateid infinite loop
   - Fail the data server I/O is the stateid represents a lost lock
   - Fix an Oopsable sunrpc trace event"

* tag 'nfs-for-3.14-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Fix oops when trace sunrpc_task events in nfs client
  NFSv4: Fail the truncate() if the lock/open stateid is invalid
  NFSv4.1 Fail data server I/O if stateid represents a lost lock
  NFSv4: Fix the return value of nfs4_select_rw_stateid
  NFSv4: nfs4_stateid_is_current should return 'true' for an invalid stateid
  NFS: Fix a delegation callback race
  NFSv4: Fix another nfs4_sequence corruptor

10 years agoMerge tag 'usb-3.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Mon, 10 Mar 2014 01:59:14 +0000 (18:59 -0700)]
Merge tag 'usb-3.14-rc6' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are 4 USB fixes for your current tree.

  Two of them are reverts to hopefully resolve the nasty XHCI
  regressions we have been having on some types of devices.  The other
  two are quirks for some Logitech video devices"

* tag 'usb-3.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  Revert "USBNET: ax88179_178a: enable tso if usb host supports sg dma"
  Revert "xhci 1.0: Limit arbitrarily-aligned scatter gather."
  usb: Make DELAY_INIT quirk wait 100ms between Get Configuration requests
  usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e

10 years agoMerge tag 'staging-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Mon, 10 Mar 2014 01:58:27 +0000 (18:58 -0700)]
Merge tag 'staging-3.15-rc6' of git://git./linux/kernel/git/gregkh/staging

Pull staging driver tree fix from Greg KH:
 "Here is a single staging driver fix for your tree.

  It resolves an issue with arbritary writes to memory if a specific
  driver is loaded"

* tag 'staging-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging/cxt1e1/linux.c: Correct arbitrary memory write in c4_ioctl()

10 years agoKEYS: Make the keyring cycle detector ignore other keyrings of the same name
David Howells [Sun, 9 Mar 2014 08:21:58 +0000 (08:21 +0000)]
KEYS: Make the keyring cycle detector ignore other keyrings of the same name

This fixes CVE-2014-0102.

The following command sequence produces an oops:

keyctl new_session
i=`keyctl newring _ses @s`
keyctl link @s $i

The problem is that search_nested_keyrings() sees two keyrings that have
matching type and description, so keyring_compare_object() returns true.
s_n_k() then passes the key to the iterator function -
keyring_detect_cycle_iterator() - which *should* check to see whether this is
the keyring of interest, not just one with the same name.

Because assoc_array_find() will return one and only one match, I assumed that
the iterator function would only see an exact match or never be called - but
the iterator isn't only called from assoc_array_find()...

The oops looks something like this:

kernel BUG at /data/fs/linux-2.6-fscache/security/keys/keyring.c:1003!
invalid opcode: 0000 [#1] SMP
...
RIP: keyring_detect_cycle_iterator+0xe/0x1f
...
Call Trace:
  search_nested_keyrings+0x76/0x2aa
  __key_link_check_live_key+0x50/0x5f
  key_link+0x4e/0x85
  keyctl_keyring_link+0x60/0x81
  SyS_keyctl+0x65/0xe4
  tracesys+0xdd/0xe2

The fix is to make keyring_detect_cycle_iterator() check that the key it
has is the key it was actually looking for rather than calling BUG_ON().

A testcase has been included in the keyutils testsuite for this:

http://git.kernel.org/cgit/linux/kernel/git/dhowells/keyutils.git/commit/?id=891f3365d07f1996778ade0e3428f01878a1790b

Reported-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge branch 'for-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Linus Torvalds [Sun, 9 Mar 2014 20:52:53 +0000 (13:52 -0700)]
Merge branch 'for-rc6' of git://git./linux/kernel/git/rzhang/linux

Pull thermal fixes from Zhang Rui:
 "Specifics:

   - Update the help text of INT3403 Thermal driver, which was not
     friendly to users.  From Zhang Rui.

   - The "type" sysfs attribute of x86_pkg_temp_thermal registered
     thermal zones includes an instance number, which makes the
     thermal-to-hwmon bridge fails to group them all in a single hwmon
     device.  Fixed by Jean Delvare.

   - The hwmon device registered by x86_pkg_temp_thermal driver is
     redundant because the temperature value reported by
     x86_pkg_temp_thermal is already reported by the coretemp driver.
     Fixed by Jean Delvare.

   - Fix a problem that the cooling device can not be updated properly
     if it is initialized at max cooling state.  From Ni Wade.

   - Fix a problem that OF registered thermal zones are running without
     thermal governors.  From Zhang Rui.

   - Commit beeb5a1e0ef7 ("thermal: rcar-thermal: Enable driver
     compilation with COMPILE_TEST") broke build on archs wihout io
     memory.  Thus make it depend on HAS_IOMEM to bypass build failures.
     Fixed by Richard Weinberger"

* 'for-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  Thermal: thermal zone governor fix
  Thermal: Allow first update of cooling device state
  thermal,rcar_thermal: Add dependency on HAS_IOMEM
  x86_pkg_temp_thermal: Fix the thermal zone type
  x86_pkg_temp_thermal: Do not expose as a hwmon device
  Thermal: update INT3404 thermal driver help text

10 years agoMerge tag 'spi-v3.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Linus Torvalds [Sun, 9 Mar 2014 20:51:47 +0000 (13:51 -0700)]
Merge tag 'spi-v3.14-rc5' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A scattering of driver specific fixes here.

  The fixes from Axel cover bitrot in apparently unmaintained drivers,
  the at79 bug is fixing a glitch on /CS during initialisation of some
  devices which could break some slaves and the remainder are fixes for
  recently introduced bugs from the past release cycle or so"

* tag 'spi-v3.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: atmel: add missing spi_master_{resume,suspend} calls to PM callbacks
  spi: coldfire-qspi: Fix getting correct address for *mcfqspi
  spi: fsl-dspi: Fix getting correct address for master
  spi: spi-ath79: fix initial GPIO CS line setup
  spi: spi-imx: spi_imx_remove: do not disable disabled clocks
  spi-topcliff-pch: Fix probing when DMA mode is used
  spi/topcliff-pch: Fix DMA channel

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sun, 9 Mar 2014 20:50:14 +0000 (13:50 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "This series addresses a number of outstanding issues wrt to active I/O
  shutdown using iser-target.  This includes:

   - Fix a long standing tpg_state bug where a tpg could be referenced
     during explicit shutdown (v3.1+ stable)
   - Use list_del_init for iscsi_cmd->i_conn_node so list_empty checks
     work as expected (v3.10+ stable)
   - Fix a isert_conn->state related hung task bug + ensure outstanding
     I/O completes during session shutdown.  (v3.10+ stable)
   - Fix isert_conn->post_send_buf_count accounting for RDMA READ/WRITEs
     (v3.10+ stable)
   - Ignore FRWR completions during active I/O shutdown (v3.12+ stable)
   - Fix command leakage for interrupt coalescing during active I/O
     shutdown (v3.13+ stable)

  Also included is another DIF emulation fix from Sagi specific to
  v3.14-rc code"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  Target/sbc: Fix sbc_copy_prot for offset scatters
  iser-target: Fix command leak for tx_desc->comp_llnode_batch
  iser-target: Ignore completions for FRWRs in isert_cq_tx_work
  iser-target: Fix post_send_buf_count for RDMA READ/WRITE
  iscsi/iser-target: Fix isert_conn->state hung shutdown issues
  iscsi/iser-target: Use list_del_init for ->i_conn_node
  iscsi-target: Fix iscsit_get_tpg_from_np tpg_state bug