Commit Graph

4563 Commits

Author SHA1 Message Date
Linus Torvalds
925e0ea47c Two trivial MTD updates for 3.17-rc4:
* A tiny comment tweak, to kill a bunch of DocBook warnings added during the
    merge window
 
  * A small fixup to the OTP routines' error handling
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Merge tag 'for-linus-20140905' of git://git.infradead.org/linux-mtd

Pull mtd fixes from Brian Norris:
 "Two trivial MTD updates for 3.17-rc4:

   - a tiny comment tweak, to kill a bunch of DocBook warnings added
     during the merge window

   - a small fixup to the OTP routines' error handling"

* tag 'for-linus-20140905' of git://git.infradead.org/linux-mtd:
  mtd: nand: fix DocBook warnings on nand_sdr_timings doc
  mtd: cfi_cmdset_0002: check return code for get_chip()
2014-09-06 12:12:09 -07:00
Roger Quadros
40ddbf5069 mtd: nand: omap: Fix 1-bit Hamming code scheme, omap_calculate_ecc()
commit 65b97cf6b8 introduced in v3.7 caused a regression
by using a reversed CS_MASK thus causing omap_calculate_ecc to
always fail. As the NAND base driver never checks for .calculate()'s
return value, the zeroed ECC values are used as is without showing
any error to the user. However, this won't work and the NAND device
won't be guarded by any error code.

Fix the issue by using the correct mask.

Code was tested on omap3beagle using the following procedure
- flash the primary bootloader (MLO) from the kernel to the first
NAND partition using nandwrite.
- boot the board from NAND. This utilizes OMAP ROM loader that
relies on 1-bit Hamming code ECC.

Fixes: 65b97cf6b8 (mtd: nand: omap2: handle nand on gpmc)

Cc: <stable@vger.kernel.org>	[3.7+]
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-08-25 16:15:33 -07:00
Roger Quadros
7d5929c1f3 mtd: nand: omap: Revert to using software ECC by default
For v3.12 and prior, 1-bit Hamming code ECC via software was the
default choice. Commit c66d039197 in v3.13 changed the behaviour
to use 1-bit Hamming code via Hardware using a different ECC layout
i.e. (ROM code layout) than what is used by software ECC.

This ECC layout change causes NAND filesystems created in v3.12
and prior to be unusable in v3.13 and later. So revert back to
using software ECC by default if an ECC scheme is not explicitely
specified.

This defect can be observed on the following boards during legacy boot

-omap3beagle
-omap3touchbook
-overo
-am3517crane
-devkit8000
-ldp
-3430sdp

Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-08-25 16:15:32 -07:00
Brian Norris
5d20bad19d mtd: cfi_cmdset_0002: check return code for get_chip()
Coverity CID 1230633

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
2014-08-15 18:09:00 -07:00
Linus Torvalds
89838b80bb No significant changes, mostly small fixes here and there. The more important
fixes are:
 
 * UBI deleted list items while iterating the list with 'list_for_each_entry'
 * The UBI block driver did not work properly with very large UBI volumes
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Merge tag 'upstream-3.17-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS changes from Artem Bityutskiy:
 "No significant changes, mostly small fixes here and there.  The more
  important fixes are:

   - UBI deleted list items while iterating the list with
     'list_for_each_entry'
   - The UBI block driver did not work properly with very large UBI
     volumes"

* tag 'upstream-3.17-rc1' of git://git.infradead.org/linux-ubifs: (21 commits)
  UBIFS: Add log overlap assertions
  Revert "UBIFS: add a log overlap assertion"
  UBI: bugfix in ubi_wl_flush()
  UBI: block: Avoid disk size integer overflow
  UBI: block: Set disk_capacity out of the mutex
  UBI: block: Make ubiblock_resize return something
  UBIFS: add a log overlap assertion
  UBIFS: remove unnecessary check
  UBIFS: remove mst_mutex
  UBIFS: kernel-doc warning fix
  UBI: init_volumes: Ignore volumes with no LEBs
  UBIFS: replace seq_printf by seq_puts
  UBIFS: replace count*size kzalloc by kcalloc
  UBIFS: kernel-doc warning fix
  UBIFS: fix error path in create_default_filesystem()
  UBIFS: fix spelling of "scanned"
  UBIFS: fix some comments
  UBIFS: remove useless @ecc in struct ubifs_scan_leb
  UBIFS: remove useless statements
  UBIFS: Add missing break statements in dbg_chk_pnode()
  ...
2014-08-13 17:42:11 -06:00
Linus Torvalds
c309bfa9b4 MTD updates for 3.17-rc1
AMD-compatible CFI driver:
  - Support OTP programming for Micron M29EW family
  - Increase buffer write timeout, according to detected flash parameter info
 
 NAND
  - Add helpers for retrieving ONFI timing modes
  - GPMI: provide option to disable bad block marker swapping (required for
      Ka-On electronics platforms)
 
 SPI NOR
  - EON EN25QH128 support
  - Support new Flag Status Register (FSR) on a few Micron flash
 
 Common
  - New sysfs entries for bad block and ECC stats
 
 And a few miscellaneous refactorings, cleanups, and driver improvements
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Merge tag 'for-linus-20140808' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "AMD-compatible CFI driver:
   - Support OTP programming for Micron M29EW family
   - Increase buffer write timeout, according to detected flash
     parameter info

  NAND
   - Add helpers for retrieving ONFI timing modes
   - GPMI: provide option to disable bad block marker swapping (required
     for Ka-On electronics platforms)

  SPI NOR
   - EON EN25QH128 support
   - Support new Flag Status Register (FSR) on a few Micron flash

  Common
   - New sysfs entries for bad block and ECC stats

  And a few miscellaneous refactorings, cleanups, and driver
  improvements"

* tag 'for-linus-20140808' of git://git.infradead.org/linux-mtd: (31 commits)
  mtd: gpmi: make blockmark swapping optional
  mtd: gpmi: remove line breaks from error messages and improve wording
  mtd: gpmi: remove useless (void *) type casts and spaces between type casts and variables
  mtd: atmel_nand: NFC: support multiple interrupt handling
  mtd: atmel_nand: implement the nfc_device_ready() by checking the R/B bit
  mtd: atmel_nand: add NFC status error check
  mtd: atmel_nand: make ecc parameters same as definition
  mtd: nand: add ONFI timing mode to nand_timings converter
  mtd: nand: define struct nand_timings
  mtd: cfi_cmdset_0002: fix do_write_buffer() timeout error
  mtd: denali: use 8 bytes for READID command
  mtd/ftl: fix the double free of the buffers allocated in build_maps()
  mtd: phram: Fix whitespace issues
  mtd: spi-nor: add support for EON EN25QH128
  mtd: cfi_cmdset_0002: Add support for locking OTP memory
  mtd: cfi_cmdset_0002: Add support for writing OTP memory
  mtd: cfi_cmdset_0002: Invalidate cache after entering/exiting OTP memory
  mtd: cfi_cmdset_0002: Add support for reading OTP
  mtd: spi-nor: add support for flag status register on Micron chips
  mtd: Account for BBT blocks when a partition is being allocated
  ...
2014-08-08 18:13:21 -07:00
Linus Torvalds
44c916d58b ARM: SoC cleanups for 3.17
This merge window brings a good size of cleanups on various
 platforms. Among the bigger ones:
 
 * Removal of Samsung s5pc100 and s5p64xx platforms. Both of these have
   lacked active support for quite a while, and after asking around nobody
   showed interest in keeping them around. If needed, they could be
   resurrected in the future but it's more likely that we would prefer
   reintroduction of them as DT and multiplatform-enabled platforms
   instead.
 * OMAP4 controller code register define diet. They defined a lot of registers
   that were never actually used, etc.
 * Move of some of the Tegra platform code (PMC, APBIO, fuse, powergate)
   to drivers/soc so it can be shared with 64-bit code. This also converts them
   over to traditional driver models where possible.
 * Removal of legacy gpio-samsung driver, since the last users have been
   removed (moved to pinctrl)
 
 Plus a bunch of smaller changes for various platforms that sort of
 dissapear in the diffstat for the above. clps711x cleanups, shmobile
 header file refactoring/moves for multiplatform friendliness, some misc
 cleanups, etc.
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Merge tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Olof Johansson:
 "This merge window brings a good size of cleanups on various platforms.
  Among the bigger ones:

   - Removal of Samsung s5pc100 and s5p64xx platforms.  Both of these
     have lacked active support for quite a while, and after asking
     around nobody showed interest in keeping them around.  If needed,
     they could be resurrected in the future but it's more likely that
     we would prefer reintroduction of them as DT and
     multiplatform-enabled platforms instead.

   - OMAP4 controller code register define diet.  They defined a lot of
     registers that were never actually used, etc.

   - Move of some of the Tegra platform code (PMC, APBIO, fuse,
     powergate) to drivers/soc so it can be shared with 64-bit code.
     This also converts them over to traditional driver models where
     possible.

   - Removal of legacy gpio-samsung driver, since the last users have
     been removed (moved to pinctrl)

  Plus a bunch of smaller changes for various platforms that sort of
  dissapear in the diffstat for the above.  clps711x cleanups, shmobile
  header file refactoring/moves for multiplatform friendliness, some
  misc cleanups, etc"

* tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (117 commits)
  drivers: CCI: Correct use of ! and &
  video: clcd-versatile: Depend on ARM
  video: fix up versatile CLCD helper move
  MAINTAINERS: Add sdhci-st file to ARCH/STI architecture
  ARM: EXYNOS: Fix build breakge with PM_SLEEP=n
  MAINTAINERS: Remove Kirkwood
  ARM: tegra: Convert PMC to a driver
  soc/tegra: fuse: Set up in early initcall
  ARM: tegra: Always lock the CPU reset vector
  ARM: tegra: Setup CPU hotplug in a pure initcall
  soc/tegra: Implement runtime check for Tegra SoCs
  soc/tegra: fuse: fix dummy functions
  soc/tegra: fuse: move APB DMA into Tegra20 fuse driver
  soc/tegra: Add efuse and apbmisc bindings
  soc/tegra: Add efuse driver for Tegra
  ARM: tegra: move fuse exports to soc/tegra/fuse.h
  ARM: tegra: export apb dma readl/writel
  ARM: tegra: Use a function to get the chip ID
  ARM: tegra: Sort includes alphabetically
  ARM: tegra: Move includes to include/soc/tegra
  ...
2014-08-08 11:00:26 -07:00
Linus Torvalds
e669830526 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for 3.17.  It contains:

   - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy  updates
   - MIPS ptrace updates and cleanups
   - various fixes that will also go to -stable
   - a number of cleanups and small non-critical fixes.
   - NUMA support for the Loongson 3.
   - more support for MSA
   - support for MAAR
   - various FP enhancements and fixes"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits)
  MIPS: jz4740: remove unnecessary null test before debugfs_remove
  MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive
  MIPS: ZBOOT: implement stack protector in compressed boot phase
  MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT
  MIPS: Bonito64: remove a duplicate define
  MIPS: Malta: initialise MAARs
  MIPS: Initialise MAARs
  MIPS: detect presence of MAARs
  MIPS: define MAAR register accessors & bits
  MIPS: mark MSA experimental
  MIPS: Don't build MSA support unless it can be used
  MIPS: consistently clear MSA flags when starting & copying threads
  MIPS: 16 byte align MSA vector context
  MIPS: disable preemption whilst initialising MSA
  MIPS: ensure MSA gets disabled during boot
  MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains
  MIPS: fix MSA context for tasks which don't use FP first
  MIPS: init upper 64b of vector registers when MSA is first used
  MIPS: save/disable MSA in lose_fpu
  MIPS: preserve scalar FP CSR when switching vector context
  ...
2014-08-07 08:47:00 -07:00
Manuel Lauss
2f73bfbe08 MIPS: Alchemy: remove au_read/write/sync
replace au_read/write/sync with __raw_read/write and wmb.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7465/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-07-30 13:56:34 +02:00
Manuel Lauss
9cf12167e9 MIPS: Alchemy: add helpers to access static memory ctrl registers.
This patch changes the static memory controller registers to offsets
from base, prefixes them with AU1000_ to avoid silent failures due to
changed addresses and introduces helpers to access them.

No functional changes, comparing assembly of a few select functions shows
no differences.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7463/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-07-30 13:53:52 +02:00
Richard Weinberger
49e236bc4a UBI: bugfix in ubi_wl_flush()
Use the _safe variant because we're iterating over a list where items get
deleted and freed.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-28 19:07:33 +03:00
Richard Weinberger
4df38926f3 UBI: block: Avoid disk size integer overflow
This patch fixes the issue that on very large UBI volumes
UBI block does not work correctly.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-28 18:52:13 +03:00
Ezequiel Garcia
0a3d571bb8 UBI: block: Set disk_capacity out of the mutex
There's no need to set the disk capacity with the mutex held, so this
commit takes the variable setting out of the mutex. This simplifies
the disk capacity fix for very large volumes in a follow up commit.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-28 18:52:10 +03:00
Ezequiel Garcia
495f2bf6c4 UBI: block: Make ubiblock_resize return something
Currently, ubiblock_resize() can fail if the device is not found
in the list. This commit changes the return type, so the function can
return something meaningful on error paths.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-28 18:52:06 +03:00
Lothar Waßmann
2a500afe1e mtd: gpmi: make blockmark swapping optional
With a flash-based BBT there is no reason to move the Factory Bad
Block Marker from the data area buffer (to where it is mapped by the
GPMI NAND controller) to the OOB buffer. Thus, make this feature
configurable via DT. This is required for the Ka-Ro electronics
platforms.

In the original code 'this->swap_block_mark' was synonymous with
'!GPMI_IS_MX23()', so use the latter at the relevant places.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-27 22:06:31 -07:00
Lothar Waßmann
d8c0372baa mtd: gpmi: remove line breaks from error messages and improve wording
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-27 22:06:30 -07:00
Lothar Waßmann
6a7609662b mtd: gpmi: remove useless (void *) type casts and spaces between type casts and variables
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-27 22:06:30 -07:00
Josh Wu
e4e0693470 mtd: atmel_nand: NFC: support multiple interrupt handling
Fix the following error, which sometimes happens during the NFC data
transfer:

  atmel_nand 80000000.nand: Time out to wait for interrupt: 0x00010000
  atmel_nand 80000000.nand: something wrong, No XFR_DONE interrupt comes.

The root cause is that in the interrupt handler, we read the ISR but
only handle one interrupt. If more than one interrupt arrive at the same
time, then the second one will be lost.

During the NFC data transfer. Two NFC interrupts (NFC_CMD_DONE and
NFC_XFR_DONE) may come at the same time.

NFC_CMD_DONE means NFC command is sent, and NFC_XFR_DONE means NFC data
is transferred.

This patch can handle multiple NFC interrupts at the same time. During
the NFC data transfer, we need to wait for two NFC interrupts:
NFC_CMD_DONE and NFC_XFR_DONE.

Also we separate the completion initialization code to a
nfc_prepare_interrupt(), which is paired with nfc_wait_interrupt().

We call nfc_prepare_interrupt() before sending out nfc commands, to make
sure no interrupt lost.

Reported-by: Matthieu CRAPET <Matthieu.CRAPET@ingenico.com>
Tested-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-21 20:05:36 -07:00
Wu, Josh
72a78e3cd2 mtd: atmel_nand: implement the nfc_device_ready() by checking the R/B bit
In nfc_device_ready(), it's more reasonable to check R/B bit in NFC_SR
than waiting for the R/B interrupt. It cost less time.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Tested-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-21 20:02:09 -07:00
Wu, Josh
50e04e2f0c mtd: atmel_nand: add NFC status error check
Add a new function to read the NFC status. Meantime, this function will
check if there is any errors in NFC.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Tested-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-21 20:02:01 -07:00
Bo Shen
b38576667c mtd: atmel_nand: make ecc parameters same as definition
If the ecc parameter is not the same as definition, when the
mtd core check these parameters, it will give the error result.

Take the following as an example:

Calculate how many bits can be corrected in one page.
According to the ecc parameters definition,

one page correct bits = (mtd->writesize * ecc->strength) / ecc->size

take the following use case as an example:
mtd->writesize = 2048 bytes
ecc->strength = 4 bytes (for 512 bytes)

before this patch, the ecc->size = 2048, so the result is 4 bytes.
after this patch, the ecc->size = 512, so the result is 16 bytes.

So, align the ecc parameters the same as definition to correct
this kind of error.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-21 19:39:55 -07:00
Boris BREZILLON
974647ea8a mtd: nand: add ONFI timing mode to nand_timings converter
Add a converter to retrieve NAND timings from an ONFI NAND timing mode.
At the moment, only SDR NAND timings are supported.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-21 19:39:55 -07:00
Brian Norris
d0d5864676 Linux 3.16-rc6
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Merge tag 'v3.16-rc6' into MTD development branch

Linux 3.16-rc6
2014-07-21 00:01:16 -07:00
Richard Weinberger
e8c235b065 UBI: init_volumes: Ignore volumes with no LEBs
UBI assumes that ubi_attach_info will only contain ubi_ainf_volume
structures for volumes with at least one LEB.
In scanning mode this is true because UBI can nicely create a ubi_ainf_volume
on demand while creating the EBA table.

For fastmap this is not true, the fastmap on-flash structure has a list of
all volumes, the ubi_ainf_volume structures are created from this list.
So it can happen that an empty volume ends up in init_volumes().

We can easely deal with that by looking into ->leb_count too.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-19 09:53:52 +03:00
Linus Torvalds
033ead8230 Two UBI fastmap-related fixes for v3.16:
1. Fix UBI fastmap support which we broke in 3.16-rc1 by reversing the
    volumes RB-tree sorting criteria.
 2. Make sure that we scrub all PEBs where we see bit-flips - we were missing
    some of them when the fastmap feature was enabled.
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Merge tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs

Pull UBI fixes from Artem Bityutskiy:
 "Two UBI fastmap-related fixes for v3.16:

   - fix UBI fastmap support which we broke in 3.16-rc1 by reversing the
     volumes RB-tree sorting criteria.
   - make sure that we scrub all PEBs where we see bit-flips - we were
     missing some of them when the fastmap feature was enabled"

* tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs:
  UBI: fastmap: do not miss bit-flips
  UBI: fix the volumes tree sorting criteria
2014-07-18 06:23:34 -10:00
Bean Huo
6534e6809e mtd: cfi_cmdset_0002: fix do_write_buffer() timeout error
For some NOR flashes, the size of the buffer program has been increased
from 256 bytes to 512 bytes, and so 2ms maximum timeout can may not be
sufficient for all different vendor's NOR flash. There is maximum
timeout information in the CFI area, so we instead of picking a fixed
value, we can calculate this according to the standard CFI parameters
parsed at probe time. If we haven't probed this information, or it is
smaller than 2000us, then specify a minimum value 2000us.

Tested with Micron JS28F512M29EWx and Micron MT28EW512ABA flash devices.

Signed-off-by: Bean Huo <beanhuo@outlook.com>
[Brian: fix up comments, use 'max()']
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-16 11:03:38 -07:00
Brian Norris
44305ebde2 UBI: fastmap: do not miss bit-flips
The return value from 'ubi_io_read_ec_hdr()' was stored in 'err', not in 'ret'.
This fix makes sure Fastmap-enabled UBI does not miss bit-flip while reading EC
headers, events and scrubs the affected PEBs.

This issue was reported by Coverity Scan.

Artem: improved the commit message.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-16 08:32:00 +03:00
grmoore@altera.com
d68a5c3d2d mtd: denali: use 8 bytes for READID command
The Denali NAND driver reads only 5 bytes of ID, but some Hynix and Samsung
have size parameters in the 6th byte.  As a result, the page and oob size
for a Hynix H27UAG8T2B were calculated incorrectly and the driver failed to
load.

The solution is to read 8 bytes of ID, as expected by the NAND framework.

Signed-off-by: Graham Moore <grmoore@altera.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-14 18:41:40 -07:00
Kevin Hao
a152056c91 mtd/ftl: fix the double free of the buffers allocated in build_maps()
I got the following panic on my fsl p5020ds board.

  Unable to handle kernel paging request for data at address 0x7375627379737465
  Faulting instruction address: 0xc000000000100778
  Oops: Kernel access of bad area, sig: 11 [#1]
  SMP NR_CPUS=24 CoreNet Generic
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.15.0-next-20140613 #145
  task: c0000000fe080000 ti: c0000000fe088000 task.ti: c0000000fe088000
  NIP: c000000000100778 LR: c00000000010073c CTR: 0000000000000000
  REGS: c0000000fe08aa00 TRAP: 0300   Not tainted  (3.15.0-next-20140613)
  MSR: 0000000080029000 <CE,EE,ME>  CR: 24ad2e24  XER: 00000000
  DEAR: 7375627379737465 ESR: 0000000000000000 SOFTE: 1
  GPR00: c0000000000c99b0 c0000000fe08ac80 c0000000009598e0 c0000000fe001d80
  GPR04: 00000000000000d0 0000000000000913 c000000007902b20 0000000000000000
  GPR08: c0000000feaae888 0000000000000000 0000000007091000 0000000000200200
  GPR12: 0000000028ad2e28 c00000000fff4000 c0000000007abe08 0000000000000000
  GPR16: c0000000007ab160 c0000000007aaf98 c00000000060ba68 c0000000007abda8
  GPR20: c0000000007abde8 c0000000feaea6f8 c0000000feaea708 c0000000007abd10
  GPR24: c000000000989370 c0000000008c6228 00000000000041ed c0000000fe00a400
  GPR28: c00000000017c1cc 00000000000000d0 7375627379737465 c0000000fe001d80
  NIP [c000000000100778] .__kmalloc_track_caller+0x70/0x168
  LR [c00000000010073c] .__kmalloc_track_caller+0x34/0x168
  Call Trace:
  [c0000000fe08ac80] [c00000000087e6b8] uevent_sock_list+0x0/0x10 (unreliable)
  [c0000000fe08ad20] [c0000000000c99b0] .kstrdup+0x44/0x90
  [c0000000fe08adc0] [c00000000017c1cc] .__kernfs_new_node+0x4c/0x130
  [c0000000fe08ae70] [c00000000017d7e4] .kernfs_new_node+0x2c/0x64
  [c0000000fe08aef0] [c00000000017db00] .kernfs_create_dir_ns+0x34/0xc8
  [c0000000fe08af80] [c00000000018067c] .sysfs_create_dir_ns+0x58/0xcc
  [c0000000fe08b010] [c0000000002c711c] .kobject_add_internal+0xc8/0x384
  [c0000000fe08b0b0] [c0000000002c7644] .kobject_add+0x64/0xc8
  [c0000000fe08b140] [c000000000355ebc] .device_add+0x11c/0x654
  [c0000000fe08b200] [c0000000002b5988] .add_disk+0x20c/0x4b4
  [c0000000fe08b2c0] [c0000000003a21d4] .add_mtd_blktrans_dev+0x340/0x514
  [c0000000fe08b350] [c0000000003a3410] .mtdblock_add_mtd+0x74/0xb4
  [c0000000fe08b3e0] [c0000000003a32cc] .blktrans_notify_add+0x64/0x94
  [c0000000fe08b470] [c00000000039b5b4] .add_mtd_device+0x1d4/0x368
  [c0000000fe08b520] [c00000000039b830] .mtd_device_parse_register+0xe8/0x104
  [c0000000fe08b5c0] [c0000000003b8408] .of_flash_probe+0x72c/0x734
  [c0000000fe08b750] [c00000000035ba40] .platform_drv_probe+0x38/0x84
  [c0000000fe08b7d0] [c0000000003599a4] .really_probe+0xa4/0x29c
  [c0000000fe08b870] [c000000000359d3c] .__driver_attach+0x100/0x104
  [c0000000fe08b900] [c00000000035746c] .bus_for_each_dev+0x84/0xe4
  [c0000000fe08b9a0] [c0000000003593c0] .driver_attach+0x24/0x38
  [c0000000fe08ba10] [c000000000358f24] .bus_add_driver+0x1c8/0x2ac
  [c0000000fe08bab0] [c00000000035a3a4] .driver_register+0x8c/0x158
  [c0000000fe08bb30] [c00000000035b9f4] .__platform_driver_register+0x6c/0x80
  [c0000000fe08bba0] [c00000000084e080] .of_flash_driver_init+0x1c/0x30
  [c0000000fe08bc10] [c000000000001864] .do_one_initcall+0xbc/0x238
  [c0000000fe08bd00] [c00000000082cdc0] .kernel_init_freeable+0x188/0x268
  [c0000000fe08bdb0] [c0000000000020a0] .kernel_init+0x1c/0xf7c
  [c0000000fe08be30] [c000000000000884] .ret_from_kernel_thread+0x58/0xd4
  Instruction dump:
  41bd0010 480000c8 4bf04eb5 60000000 e94d0028 e93f0000 7cc95214 e8a60008
  7fc9502a 2fbe0000 419e00c8 e93f0022 <7f7e482a> 39200000 88ed06b2 992d06b2
  ---[ end trace b4c9a94804a42d40 ]---

It seems that the corrupted partition header on my mtd device triggers
a bug in the ftl. In function build_maps() it will allocate the buffers
needed by the mtd partition, but if something goes wrong such as kmalloc
failure, mtd read error or invalid partition header parameter, it will
free all allocated buffers and then return non-zero. In my case, it
seems that partition header parameter 'NumTransferUnits' is invalid.

And the ftl_freepart() is a function which free all the partition
buffers allocated by build_maps(). Given the build_maps() is a self
cleaning function, so there is no need to invoke this function even
if build_maps() return with error. Otherwise it will causes the
buffers to be freed twice and then weird things would happen.

Cc: stable@vger.kernel.org
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-14 18:41:20 -07:00
Rob Ward
c95777a4bb mtd: phram: Fix whitespace issues
Fix various whitespace issues.

No functional changes.

Signed-off-by: Rob Ward <robert.ward114@googlemail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-14 10:20:19 -07:00
Sergey Ryazanov
a41595b34b mtd: spi-nor: add support for EON EN25QH128
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-14 10:18:49 -07:00
Andrea Adami
812c5fa82b mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR
This family of chips was long ago supported by the pre-cfi driver.
CFI code tested on several Zaurus SL-5500 (Collie) 2x16 on 32 bit bus.

Function is_LH28F640BF() mimics is_m29ew() from cmdset_0002.c

Buffer write fixes as seen in 2007 patch c/o
Anti Sullin <anti.sullin <at> artecdesign.ee>
http://comments.gmane.org/gmane.linux.ports.arm.kernel/36733

[Brian: this patch is semi-urgent, because the following patch switches
  to using CFI detection for a chip which (until now) is unsupported by
  the CFI driver

  9218310  ARM: 8084/1: sa1100: collie: revert back to cfi_probe
]

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-13 22:22:47 -07:00
Thomas Petazzoni
54c39e9ba3 mtd: nand: reduce the warning noise when the ECC is too weak
In commit 67a9ad9b8a ("mtd: nand: Warn the user if the selected ECC
strength is too weak"), a check was added to inform the user when the
ECC used for a NAND device is weaker than the recommended ECC
advertised by the NAND chip. However, the warning uses WARN_ON(),
which has two undesirable side-effects:

 - It just prints to the kernel log the fact that there is a warning
   in this file, at this line, but it doesn't explain anything about
   the warning itself.

 - It dumps a stack trace which is very noisy, for something that the
   user is most likely not able to fix. If a certain ECC used by the
   kernel is weaker than the advertised one, it's most likely to make
   sure the kernel uses an ECC that is compatible with the one used by
   the bootloader, and changing the bootloader may not necessarily be
   easy. Therefore, normal users would not be able to do anything to
   fix this very noisy warning, and will have to suffer from it at
   every kernel boot. At least every time I see this stack trace in my
   kernel boot log, I wonder what new thing is broken, just to realize
   that it's once again this NAND ECC warning.

Therefore, this commit turns:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at /home/thomas/projets/linux-2.6/drivers/mtd/nand/nand_base.c:4051 nand_scan_tail+0x538/0x780()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 3.16.0-rc3-dirty #4
[<c000e3dc>] (unwind_backtrace) from [<c000bee4>] (show_stack+0x10/0x14)
[<c000bee4>] (show_stack) from [<c0018180>] (warn_slowpath_common+0x6c/0x8c)
[<c0018180>] (warn_slowpath_common) from [<c001823c>] (warn_slowpath_null+0x1c/0x24)
[<c001823c>] (warn_slowpath_null) from [<c02c50cc>] (nand_scan_tail+0x538/0x780)
[<c02c50cc>] (nand_scan_tail) from [<c0639f78>] (orion_nand_probe+0x224/0x2e4)
[<c0639f78>] (orion_nand_probe) from [<c026da00>] (platform_drv_probe+0x18/0x4c)
[<c026da00>] (platform_drv_probe) from [<c026c1f4>] (really_probe+0x80/0x218)
[<c026c1f4>] (really_probe) from [<c026c47c>] (__driver_attach+0x98/0x9c)
[<c026c47c>] (__driver_attach) from [<c026a8f0>] (bus_for_each_dev+0x64/0x94)
[<c026a8f0>] (bus_for_each_dev) from [<c026bae4>] (bus_add_driver+0x144/0x1ec)
[<c026bae4>] (bus_add_driver) from [<c026cb00>] (driver_register+0x78/0xf8)
[<c026cb00>] (driver_register) from [<c026da5c>] (platform_driver_probe+0x20/0xb8)
[<c026da5c>] (platform_driver_probe) from [<c00088b8>] (do_one_initcall+0x80/0x1d8)
[<c00088b8>] (do_one_initcall) from [<c0620c9c>] (kernel_init_freeable+0xf4/0x1b4)
[<c0620c9c>] (kernel_init_freeable) from [<c049a098>] (kernel_init+0x8/0xec)
[<c049a098>] (kernel_init) from [<c00095f0>] (ret_from_fork+0x14/0x24)
---[ end trace 62f87d875aceccb4 ]---

Into the much shorter, and much more useful:

nand: WARNING: MT29F2G08ABAEAWP: the ECC used on your system is too weak compared to the one required by the NAND chip

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-13 22:19:02 -07:00
Kukjin Kim
e393bc0900 mtd: onenand: remove s5pc100 related onenand codes
This patch removes s5pc100 related onenand codes because of no more
support for S5PC100 SoC in mainline.

Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-07-13 07:35:14 +09:00
Christian Riesch
4f5cb24382 mtd: cfi_cmdset_0002: Add support for locking OTP memory
This patch adds support for the locking of the one time
programmable (OTP) memory of Micron M29EW devices.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-11 19:44:25 -07:00
Christian Riesch
af74475057 mtd: cfi_cmdset_0002: Add support for writing OTP memory
This patch adds support for writing the one time programmable (OTP)
memory of Micron M29EW devices.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-11 19:44:25 -07:00
Christian Riesch
feb8677935 mtd: cfi_cmdset_0002: Invalidate cache after entering/exiting OTP memory
When the one time programmable (OTP) memory region is entered by
issuing the 0xaa/0x55/0x88 command, the OTP memory occupies the
addresses which are normally used by the first sector of the regular
flash memory. This patch therefore invalidates cache for this
addresses after entering/exiting OTP memory.

This patch also moves the code into separate functions.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-11 19:44:24 -07:00
Christian Riesch
dc7e9ecdd6 mtd: cfi_cmdset_0002: Add support for reading OTP
The Micron M29EW has a 256 byte one time programmable (OTP) memory.
This patch adds support for reading this memory. This support will be
extended for locking and writing in subsequent patches.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-11 19:44:24 -07:00
grmoore@altera.com
c14deddec1 mtd: spi-nor: add support for flag status register on Micron chips
Some new Micron flash chips require reading the flag status register to
determine when operations have completed.

Furthermore, chips with multi-die stacks of the 65nm 256Mb QSPI also
require reading the status register before reading the flag status
register.

This patch adds support for the flag status register in the n25q512ax3
and n25q00 Micron QSPI flash chips.

Signed-off-by: Graham Moore <grmoore@altera.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-11 19:10:35 -07:00
Ezequiel Garcia
fdf43a420f mtd: Account for BBT blocks when a partition is being allocated
With the introduction of mtd_block_isreserved(), it's now possible
to fix the bad and reserved block distribution exposed by ecc_stats,
instead of accounting all the bad or reserved blocks as 'bad'.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-08 18:38:29 -07:00
Ezequiel Garcia
8471bb73ba mtd: Introduce mtd_block_isreserved()
In addition to mtd_block_isbad(), which checks if a block is bad or
reserved, it's needed to check if a block is reserved only (but not
bad). This commit adds an MTD interface for it, in a similar fashion to
mtd_block_isbad().

While here, fix mtd_block_isbad() so the out-of-bounds checking is done
before the callback check.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-08 18:38:16 -07:00
Ezequiel Garcia
990a3af0c2 mtd: Add sysfs attributes to expose the ECC stats fields
These new sysfs device attributes allow us to retrieve the ECC and bad
block stats by poking a sysfs file, which is often more convenient than
using the ioctl.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-08 18:37:26 -07:00
Ted Juan
6938ad40cb mtd: devices: elm: fix elm_context_save() and elm_context_restore() functions
These two function's switch case lack the 'break' that make them always
return error.

Signed-off-by: Ted Juan <ted.juan@gmail.com>
Acked-by: Pekon Gupta <pekon@ti.com>
Cc: <stable@vger.kernel.org> # 3.12.x+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-05 15:44:42 -07:00
Fabian Frederick
89384f6462 mtd: phram: replace kmalloc/strcpy by kstrdup
Cc: Joern Engel <joern@lazybastard.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-05 15:40:38 -07:00
Brian Norris
1360246a4f mtd: bf5xx_nand: drop no-op PM support
This driver's suspend/resume hooks are no-ops, so just remove them.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>
2014-07-02 17:42:57 -07:00
Kevin Hao
da90c4ecbc mtd/ftl: drop the useless VirtualPageMap in partition_t
This is not used by any code now. Just drop it.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-02 15:22:01 -07:00
Atsushi Nemoto
e4c4c9c15e mtd: maps: rbtx4939-flash: delete an unused variable in rbtx4939_flash_remove
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-02 15:21:39 -07:00
Vasily Khoruzhick
887957b4af mtd: s3c2410: Move to clk_prepare_enable/clk_disable_unprepare
Use clk_prepare_enable/clk_disable_unprepare to make the driver
work properly with common clock framework.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-02 15:19:22 -07:00
Geert Uytterhoeven
29f63f65cc mtd: cmdlinepart: Spelling s/trucate/truncate/
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-02 15:17:15 -07:00
Brian Norris
adddcac0a2 mtd: lpc32xx: drop bitflip_threshold initialization
These drivers don't need to explicitly initialize their bitflip
thresholds. The comment is no longer correct, since nand_scan_tail()
performs this initialization as of the following commit:

    commit ea3b2ea24e
    Author: Shmulik Ladkani <shmulik@jungo.com>
    Date:   Fri Jun 8 18:29:06 2012 +0300

        mtd: nand: initialize bitflip_threshold prior to BBT scanning

(It seems there were some parallel efforts on writing/submitting these
drivers, and Shmulik's bug fix.)

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Roland Stigge <stigge@antcom.de>
2014-07-01 18:55:02 -07:00