We recently started trying to merge the jffs2_raw_node_ref structures
for adjacent obsolete nodes. Fix a bunch of problems in that:
 - Free inode cache structure for a dead inode which is now completely gone.
 - Fix races vs. erase code which also walks the same lists.
 - Fix BUG() when trying to merge with a node which still belongs to an inode.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

If the node with lowest version in a file was in the range
0xfffff000 onwards, we oopsed because our rounding was bogus.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

We want to contribute the NAND flash simulator which we successfully use 
when developing JFFS2. It is very useful tool which helps to develop 
without real flash.

It supports several options which allow to select which flash type to 
emulate (just flash IDs which are in nand_ids.c file). See modinfo for 
other options.
Signed-off-by: Artem B. Bityuckiy <dedekind@yandex.ru>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Spotted by Shannon Holland.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Only this time, set the field we were dereferencing _after_ we zero it not before.
Signed-off-by: Kalev Lember <kalev@colleduc.ee>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

o Add simple usage example.
o Fix up unit handling (k, M. G).
o Use correct size limit for setup string.
o Remove pointless printk message.
o Fix mtdblock to not allocate a read-modify-write buffer for CAP_RAM
  devices (and fail to do so, returning an error).
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

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>