kernel/git/stable/linux.git/drivers/mtd/chips, branch linux-2.6.24.y

mtd: fix broken state in CFI driver caused by FL_SHUTDOWN

2008-04-19T01:53:23+00:00

upstream commit: fb6d080c6f75dfd7e23d5a3575334785aa8738eb THe CFI driver in 2.6.24 kernel is broken. Not so intensive read/write operations cause incomplete writes which lead to kernel panics in JFFS2. We investigated the issue - it is caused by bug in FL_SHUTDOWN parsing code. Sometimes chip returns -EIO as if it is in FL_SHUTDOWN state when it should wait in FL_PONT (error in order of conditions). The following patch fixes the bug in state parsing code of CFI. Also I've added comments to notify developers if they want to add new case in future. Signed-off-by: Alexey Korolev Reviewed-by: Joern Engel Cc: David Woodhouse Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Chris Wright

cache invalidation error for buffered write

2008-01-11T19:44:37+00:00

The bug causes corruptions of data read from flash. The original code performs cache invalidation from "adr" to "adr + len" in do_write_buffer(). Since len and adr could be updated in the code before invalidation - it causes improper setting of cache invalidation regions. Signed-off-by: Massimo Cirillo Signed-off-by: Giuseppe D'Eliseo Acked-by: Nicolas Pitre Acked-by: Jörn Engel Signed-off-by: David Woohouse Signed-off-by: Linus Torvalds

[MTD] [NOR] Fix deadlock in Intel chip driver caused by get_chip recursion

2007-10-23T11:07:52+00:00

This patch solves kernel deadlock issue seen on JFFF2 simultaneous operations. Detailed investigation of the issue showed that the kernel deadlock is caused by tons of recursive get_chip calls. Signed-off-by: Alexey Korolev Acked-by: Nicolas Pitre Signed-off-by: David Woodhouse

[MTD] [NOR] fix ctrl-alt-del can't reboot for intel flash bug

2007-10-13T13:36:18+00:00

When we press ctrl-alt-del,kernel_restart_prepare will invoke cfi_intelext_reboot which will set flash to read array mode, but later when device_shutdown is invoked which may put current work queue to sleep and other process may be scheduled to running and programming flash in not FL_READY mode again. So we can't boot up if this flash is used for bootloader. Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse

[MTD] fix CFI point method for discontiguous maps

2007-09-23T17:40:49+00:00

The CFI probe routine is capable of detecting flash banks consisting of identical chips mapped to physically discontiguous addresses. (One common way this can occur is if a flash bank is populated with chips of less capacity than the hardware was designed to support.) The CFI point() routine currently ignores any such gaps. This patch fixes the CFI point() routine so that it truncates any request that would span a gap. Signed-off-by: Andy Lowe Signed-off-by: Nicolas Pitre Signed-off-by: David Woodhouse

[MTD] Clean up duplicate includes in drivers/mtd/

2007-07-23T10:56:27+00:00

This patch cleans up duplicate includes in drivers/mtd/ Signed-off-by: Jesper Juhl Signed-off-by: David Woodhouse

[MTD] [NOR] add FUJITSU MBM29F800BA and ST M29F800AB descriptions

2007-07-06T03:29:49+00:00

Add descriptions for Fujitsu MBM29F800BA and ST M29F800AB flash chips. Those chips are compatible (except for the ids) with the AMD AM29F800BB. Signed-off-by: Philippe De Muyter Signed-off-by: David Woodhouse

[MTD] [CHIPS] fix tiny spelling error in comment in cfi_cmdset_0001.c

2007-07-05T00:24:11+00:00

Trivial fix of a spelling error in a comment in cfi_cmdset_0001.c s/ships/chips/ Signed-off-by: Jesper Juhl Signed-off-by: David Woodhouse

[MTD] [NOR] Use NULL instead of 0 for pointer to shut sparse up.

2007-06-28T22:00:09+00:00

Use NULL instead of 0 for pointer: drivers/mtd/chips/cfi_cmdset_0001.c:2258:43: warning: Using plain integer as NULL pointer Other changes by inspection. Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse

[MTD] [NOR] cfi_cmdset_0001.c: sparse fixes

2007-06-28T19:24:31+00:00

Fix sparse warnings generated from cfi_cmdset_0001.c. drivers/mtd/chips/cfi_cmdset_0001.c:1783:5: warning: symbol 'cfi_intelext_erase_varsize' was not declared. Should it be static? drivers/mtd/chips/cfi_cmdset_0001.c:2258:43: warning: Using plain integer as NULL pointer Signed-off-by: Ben Dooks Signed-off-by: David Woodhouse