The redboot partitioning code currently searches for a FIS table entry
named "RedBoot" (including the trailing \0) in one of the first three
entries to try and verify that the sector it is looking at really is a
FIS partition table.

Firstly it fails when RedBoot is stored in some other Flash chip such as
a boot PROM, in this case there is no "RedBoot" entry in the partition
table. However there will always be a "FIS directory" entry in any valid
FIS directory.
        
Secondly it can fail since the RedBoot entry is not always in the first
3 slots -- this can happen for example on an x86 based platform where
the processor expects the boot device to be at the top of memory rather
than the bottom and so RedBoot is at the end of the flash device.
Equally when using "FIS directory" as the entry to search for it very
likely is not in the first three since the directory is typically at the
end of the flash.
Signed-off-by: Ian Campbell <icampbell@arcom.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Description: Use msleep() instead of schedule_timeout()
to guarantee the task delays as expected.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

With SMP or preempt, we could attempt to read data from the wbuf 
while it was being updated. Introduce a new rwsem to prevent this,
and update the documentation accordingly
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We weren't releasing all the temporary dirent structures we may have
built up during the first part of the scan.
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

If a directory entry refers to an inode which doesn't actually exist,
we weren't marking it obsolete, so it was still visible in the file
system, and would give EIO if you ever tried to stat it. Once upon
a time, perl -e 'unlink' and rm -f would manage to unlink such things
but nowadays they both try to stat it first and stupidly refuse to 
even attempt the unlink if the stat fails, and this is more of a 
problem. So we throw it away ourselves. 
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

New eyes are looking over ancient code and comments which were put
in as the design was first coming together... and which don't make
even the slightest bit of sense any more.
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Thayne Harbaugh <tharbaugh@lnxi.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

They were missing unlock address and command set fields.

From: David Vrabel <dvrabel@arcom.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We no longer use this, since we rewrote the mount code to behave
entirely differently and not build up all the trees on mount.
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

The work address is increasingly unreliable and incompetently run.
Time to remove all visible instances of it and rely only on one 
which isn't run by crack-monkeys.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

 - Support 2048-byte HW ECC (from Juha Yrjölä <juha.yrjola@nokia.com>)
 - Allow board drivers to provide pattern for bad block scanning
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

This allows for MTD support to be used on flash memory which is also used
for XIP purposes, either XIP kernel or XIP userspace.  The whole idea is
to relocate functions actually modifying the flash state away from array mode
to ram and run them with interrupt disabled.  When the flash needs some time
to complete a certain operation, we poll the processor for pending (but still
masked) interrupts, and when they occur we suspend the flash operation in order
to unmask interrupts and let the system run again.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Josh Boyer <jdub@us.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

The patch below makes the following cleanups for code under drivers/mtd/ :
- make some needlessly global code static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

fs/jffs2/gc.c:832: warning: signed size_t format, different type arg 
(arg 3)
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

... and should include it directly rather than hoping it's been done.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We had it already in the inocache structure we were being passed
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We weren't correctly holding a lock when adding raw nodes to the 
per-inode list.
Signed-off-by: Artem Bityuckiy <dedekind@infradead.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Determine it from the CFI query data instead of hard-coding it.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: David Woodhouse <dwmw2@infradead.org> 

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Pete Popov <ppopov@embeddedalley.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Fix kernel NULL pointer dereference at mtd_erase_callback+6 when trying
to insmod INFTL or NFTL modules.
Signed-off-by: Kalev Lember <kalev@colleduc.ee>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We weren't correctly resetting our idea of the chip's state on suspend
in all circumstances. Fix that.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Cleanups and fixes in preparation for XIP support -- fix unbalanced use
of get_chip() and put_chip(), and clean up the code a little in 
preparation for what's to come.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Originally from Joe Perches <joe@perches.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Miles Bader <miles@gnu.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- changed initialization of spin locks from SPIN_LOCK_UNLOCKED into
  spin_lock_init()
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- removed old queueing code and replaced it with new wait_event API
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- remove unused code
- make needlessly global code static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- changed code with BUG() to use BUG_ON() which could be optimized by some
  platforms (original from Milton Miller)
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>