dm integrity: change 'suspending' variable from bool to int
Early alpha processors can't write a byte or short atomically - they
read 8 bytes, modify the byte or two bytes in registers and write back
8 bytes.
The modification of the variable "suspending" may race with
modification of the variable "failed". Fix this by changing
"suspending" to an int.
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 86438b2..0a8a4c2 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -178,7 +178,7 @@ struct dm_integrity_c {
__u8 sectors_per_block;
unsigned char mode;
- bool suspending;
+ int suspending;
int failed;
@@ -2210,7 +2210,7 @@ static void dm_integrity_postsuspend(struct dm_target *ti)
del_timer_sync(&ic->autocommit_timer);
- ic->suspending = true;
+ WRITE_ONCE(ic->suspending, 1);
queue_work(ic->commit_wq, &ic->commit_work);
drain_workqueue(ic->commit_wq);
@@ -2220,7 +2220,7 @@ static void dm_integrity_postsuspend(struct dm_target *ti)
dm_integrity_flush_buffers(ic);
}
- ic->suspending = false;
+ WRITE_ONCE(ic->suspending, 0);
BUG_ON(!RB_EMPTY_ROOT(&ic->in_progress));