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| author | Massimo Cirillo <maxcir@gmail.com> | 2008-01-11 10:24:11 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-11 11:44:37 -0800 |
| commit | 646fd12784d506180353005f40f90bcf08c84a3e (patch) | |
| tree | 69cd72ea6fb51212d439bd3e4237126af2b6ada2 /drivers/mtd | |
| parent | 7c48c56e9b5a51263269dd419cc32531db141340 (diff) | |
| download | kernel_samsung_tuna-646fd12784d506180353005f40f90bcf08c84a3e.zip kernel_samsung_tuna-646fd12784d506180353005f40f90bcf08c84a3e.tar.gz kernel_samsung_tuna-646fd12784d506180353005f40f90bcf08c84a3e.tar.bz2 | |
cache invalidation error for buffered write
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 <maxcir@gmail.com>
Signed-off-by: Giuseppe D'Eliseo <giuseppedeliseo@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Jörn Engel <joern@logfs.org>
Signed-off-by: David Woohouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0001.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index a9eb1c5..1707f98 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -1504,9 +1504,12 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, int ret, wbufsize, word_gap, words; const struct kvec *vec; unsigned long vec_seek; + unsigned long initial_adr; + int initial_len = len; wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; adr += chip->start; + initial_adr = adr; cmd_adr = adr & ~(wbufsize-1); /* Let's determine this according to the interleave only once */ @@ -1519,7 +1522,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, return ret; } - XIP_INVAL_CACHED_RANGE(map, adr, len); + XIP_INVAL_CACHED_RANGE(map, initial_adr, initial_len); ENABLE_VPP(map); xip_disable(map, chip, cmd_adr); @@ -1610,7 +1613,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, chip->state = FL_WRITING; ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, - adr, len, + initial_adr, initial_len, chip->buffer_write_time); if (ret) { map_write(map, CMD(0x70), cmd_adr); |