diff options
| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2013-06-26 15:28:39 +0300 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2016-12-11 12:53:04 +0100 |
| commit | de49402eb1212dfb24584f296cb06549db7930f1 (patch) | |
| tree | 823c75c59f2a207d6efcbe73354366175bfd2439 | |
| parent | 67458e9e1f13ab39df41cad4f7f3832bdd961f51 (diff) | |
staging: zram: protect zram_reset_device() call
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 <sergey.senozhatsky@gmail.com>
Acked-by: Jerome Marchand <jmarchand@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/zram/zram_drv.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 3c7e3e9a7..4a1572bd6 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) |