Re: cfi_cmdset_0002: do_write_buffer timeouts

[Huang Shijie <b32955@freescale.com>]

于 2013年04月13日 10:59, Brian Norris 写道:
> Disabling CONFIG_NO_HZ doesn't fix my problem.
I also disable the CONFIG_NO_HZ, and it does not fix my problem too.

But after i remove the mutex_unlock/mutex_lock in 
UDELAY/INVALIDATE_CACHE_UDELAY,
my problem disappears. I run for three days, no timeout occurs. (I do 
not enable the CONFIG_MTD_XIP).


--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1043,17 +1043,13 @@ static void __xipram xip_udelay(struct map_info 
*map, struct flchip *chip,

#define UDELAY(map, chip, adr, usec) \
do { \
- mutex_unlock(&chip->mutex); \
cfi_udelay(usec); \
- mutex_lock(&chip->mutex); \
} while (0)

#define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
do { \
- mutex_unlock(&chip->mutex); \
INVALIDATE_CACHED_RANGE(map, adr, len); \
cfi_udelay(usec); \
- mutex_lock(&chip->mutex); \
} while (0)

#endif
-- 




thanks
Huang Shijie