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[PATCH] cfi_cmdset_0001: fix range for cache invalidation 

I found an issue in cfi_cmdset0001.c.  It is related to cache region
invalidation in the buffered write procedure.

The code performs cache invalidation from "cmd_addr" to "cmd_adr + len" in
do_write_buffer() while we modify region from "adr" to "adr+len".

This issue affects writes + reads of data by small chunks.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alexey Korolev 2006-02-20 18:27:55 -08:00 committed by Linus Torvalds
parent 7d4c8e5610
commit d86d43706a
1 changed files with 7 additions and 7 deletions
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14
drivers/mtd/chips/cfi_cmdset_0001.c
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@ -1019,8 +1019,8 @@ static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
#define XIP_INVAL_CACHED_RANGE(map, from, size) \
INVALIDATE_CACHED_RANGE(map, from, size)
#define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
UDELAY(map, chip, adr, usec)
#define INVALIDATE_CACHE_UDELAY(map, chip, cmd_adr, adr, len, usec) \
UDELAY(map, chip, cmd_adr, usec)
/*
* Extra notes:
@ -1052,7 +1052,7 @@ do { \
spin_lock(chip->mutex); \
} while (0)
#define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
#define INVALIDATE_CACHE_UDELAY(map, chip, cmd_adr, adr, len, usec) \
do { \
spin_unlock(chip->mutex); \
INVALIDATE_CACHED_RANGE(map, adr, len); \
@ -1284,7 +1284,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
map_write(map, datum, adr);
chip->state = mode;
INVALIDATE_CACHE_UDELAY(map, chip,
INVALIDATE_CACHE_UDELAY(map, chip, adr,
adr, map_bankwidth(map),
chip->word_write_time);
@ -1572,8 +1572,8 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
map_write(map, CMD(0xd0), cmd_adr);
chip->state = FL_WRITING;
INVALIDATE_CACHE_UDELAY(map, chip,
cmd_adr, len,
INVALIDATE_CACHE_UDELAY(map, chip, cmd_adr,
adr, len,
chip->buffer_write_time);
timeo = jiffies + (HZ/2);
@ -1744,7 +1744,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
chip->state = FL_ERASING;
chip->erase_suspended = 0;
INVALIDATE_CACHE_UDELAY(map, chip,
INVALIDATE_CACHE_UDELAY(map, chip, adr,
adr, len,
chip->erase_time*1000/2);