Commit 9b3bb7abcdf2df0f1b2657e6cbc9d06bc2b3b36f (remove zram_sysfs file (v2)) accidentally made zram_reset_device() racy. Protect zram_reset_device() call with zram->lock.
Signed-off-by: Sergey Senozhatsky <[email protected]> --- drivers/staging/zram/zram_drv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 82c7202..e77fb6e 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -527,8 +527,11 @@ static void zram_reset_device(struct zram *zram) size_t index; struct zram_meta *meta; - if (!zram->init_done) + down_write(&zram->init_lock); + if (!zram->init_done) { + up_write(&zram->init_lock); return; + } meta = zram->meta; zram->init_done = 0; @@ -549,6 +552,7 @@ static void zram_reset_device(struct zram *zram) zram->disksize = 0; set_capacity(zram->disk, 0); + up_write(&zram->init_lock); } static void zram_init_device(struct zram *zram, struct zram_meta *meta) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
