After a write error, any data in the write buffer must
be relocated.  This is handled by the jffs2_wbuf_recover
function.  This function does not fix up the erase block
summary information that is collected for writing at the
end of the block, which results in an incorrect summary
(or BUG if the summary was found to be empty).

As the summary is not essential (it is an optimisation),
it may be disabled for the current erase block when this
situation arises.  This patch does that.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

If a write error occurs, the affected block is placed on the
bad_used_list.  In the case that the write error occured
when writing summary data the block was also being placed on
the dirty_list, which caused list corruption and ultimately
a soft lockup in jffs2_mark_node_obsolete. This fixes that.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

A new module parameter has been added called 'overridesize',
which overrides the size that would be determined by the
ID bytes. 'overridesize' is specified in erase blocks and
as the exponent of a power of two e.g. 5 means a size of
32 erase blocks.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

A new module parameter 'rptwear' specifies how many erases between
reporting wear information.  Zero means never.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

New module parameters have been added to nandsim to
simulate:

        bitflips        random bit flips
        badblocks       blocks that are initially marked bad
        weakblocks      blocks that fail to erase after a
                        small number of erase cycles
        weakpages       pages that fail to write after a
                        small number of successful writes
        gravepages      pages that fail to read after a
                        small number of successful reads
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Enhance nandsim to be able to create more than 1 partition.
A new module parameter 'parts' may be used to specify partition
sizes.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

When the MTD driver returns write failure, the following deadlock
occurs:

We are in __jffs2_flush_wbuf(), we hold &c->wbuf_sem. Write failure.
jffs2_wbuf_recover()->jffs2_reserve_space_gc()->jffs2_do_reserve_space()
->jffs2_erase_pending_blocks()->jffs2_flash_read()

and it tries to lock &c->wbuf_sem again. Deadlock.
Reported-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

There is a slight bug in nand_default_block_markbad, where the offset is
cast to an integer, prior to being shifted. This means that on large
offsets, it is incorrectly doing a signed shift & losing bits. Fixed
this by doing the cast after the shift (as is done elsewhere in the code).
Signed-off-by: Andre Renaud <andre@bluewatersys.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Add support for AT26Fxxx dataflash devices. These devices have a quite different
commandset than the AT45xxx chips, which are handled by at91_dataflash.c, so a
combined driver turned out to be more ugly than useful.

Tested only on AT26F004.
Signed-off-by: Hans-Jürgen Koch <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

The ops.len member is not initialized, because it is unused for this
operation. The length check needs to use ops.ooblen instead
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

The support for obsolete ancient NAND chips adds .data size and one
of the old ids conflicts with a modern one. Make the support for
such chips depending on a config option.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Use the functions in the ecc structure instead of the default ones,
so the override by the board driver is effective also for software ecc
code paths.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Add Micron Manufacturer ID.
Signed-off-by: Shahrom Sharif <sshahrom@micron.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Check the node CRC on scan before doing anything else with the node.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

 o A dependency on the processor architecture does not make sense;
   delete it.
 o The Alchemy and MTX drivers requires MTD_PARTITIONS and MTD_CFI to work,
   make those dependencies.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Delete RCS $Id string and unused debug code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Auto unlock sectors on resume for auto locking flash on power up.
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Delete everything related to the apparently non-existent kernel config
option JFFS2_PROC.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Add flash and rootfs mappings for the PMC-Sierra MSP71xx devices.

This patch references some platform support files previously submitted to
the linux-mips@linux-mips.org list.
Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Delete the unreferenced header file include/linux/mtd/iflash.h.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We'll need them for suspend/resume.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

  Delete the obsolete source file fs/jffs2/comprtest.c.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [IPV6] fix ipv6_getsockopt_sticky copy_to_user leak
  [IPV6]: Fix for ipv6_setsockopt NULL dereference
  [DCCP]: Initialise write_xmit_timer also on passive sockets
  [IPV4]: Fix rtm_to_ifaddr() error handling.

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] refresh config files
  [IA64] put kdump_find_rsvd_region in __init
  [IA64] Remove sparse warning from unwind code
  [IA64] add missing syscall trace clear
  [IA64] Cleanup in crash.c
  [IA64] kexec: declare ia64_mca_pal_base in mca.h rather than kexec.h
  [IA64] pci_get_legacy_ide_irq should return irq (not GSI)
  [IA64] whitespace fixes for include/asm-ia64/sal.h
  [IA64] Cache error recovery
  [IA64] Proper handling of TLB errors from duplicate itr.d dropins

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
  kobject: new_device->kref wasn't putted after error in kobject_move()
  driver core: export device_rename
  Remove devfs from MAINTAINERS
  Driver core: add device symlink back to sysfs
  Revert "driver core: refcounting fix"

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6:
  pci: fix section mismatch warning
  PCI: aer: fix section mismatch warning
  pcie: fix section mismatch warning
  PCI: allow multiple calls to pcim_pin_device()

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (23 commits)
  USB Elan FTDI: check for workqueue creation
  USB: fix spinlock recursion in cdc-acm.c
  USB: fix Unaligned access in EHCI driver
  USB: Product ID for FT232RL in ftdi_sio
  USBNET: DM9501: Add Corega FEther USB-TXC support.
  USB: ipaq.c: Additional devices
  USB: further fix for usb-serial
  USB: fix usb-serial device naming bug
  USB: RTS/DTR signal patch for airprime driver
  USB: ftdi_sio: use port_probe / port_remove thereby fixing access to the latency_timer
  usb-serial: fix shutdown / device_unregister order
  USB: add Additional PIDs in ftdi_sio
  USB: add QL355P power supply ids to fdti_sio
  USB: New device IDs for cp2101 driver
  USB: kill dead code from hub.c
  USB: ratelimit debounce error messages
  USB: pxa2xx_udc: fix hardcoded irq number
  UHCI: fix port resume problem
  USB: set the correct interval for interrupt URBs
  USB: goku_udc: Remove crude cache coherency code
  ...

Delay the read of the EC status register until
after the event that caused it occurs -- otherwise
it is possible to read and act on stale status that was
associated with the previous event.

Do this with a perpetually incrementing "event_count" to detect
when a new event occurs and it is safe to read status.

There is no workaround for polling mode -- it is inherently
exposed to reading and acting on stale status, since it
doesn't have an interrupt to tell it the event completed.

http://bugzilla.kernel.org/show_bug.cgi?id=8110Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Avoid NULL pointer usage if workqueue creation failed.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>