Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

cache invalidation error for buffered write

Browse source 
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>
This commit is contained in:
Massimo Cirillo 2008-01-11 10:24:11 +00:00 committed by Linus Torvalds
parent 7c48c56e9b
commit 646fd12784
1 changed files with 5 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/mtd/chips/cfi_cmdset_0001.c
View file

@ -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);