Since blk_queue_enter() uses rcu_read_lock_sched() scsi_device_quiesce()
must use synchronize_sched().
Reported-by: Tejun Heo <t...@kernel.org>
Fixes: 3a0a529971ec ("block, scsi: Make SCSI quiesce and resume work reliably")
Signed-off-by: Bart Van Assche <bart.vanass...@wdc.com>
Cc: Hannes Reinecke <h...@suse.com>
Cc: Ming Lei <ming....@redhat.com>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Johannes Thumshirn <jthumsh...@suse.de>
Cc: Tejun Heo <t...@kernel.org>
Cc: Oleksandr Natalenko <oleksa...@natalenko.name>
Cc: Martin Steigerwald <mar...@lichtvoll.de>
Cc: sta...@vger.kernel.org # v4.15
---
drivers/scsi/scsi_lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 1d83f29aee74..0b99ee2fbbb5 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -3014,7 +3014,7 @@ scsi_device_quiesce(struct scsi_device *sdev)
* unfreeze even if the queue was already frozen before this function
* was called. See also https://lwn.net/Articles/573497/.
*/
- synchronize_rcu();
+ synchronize_sched();
blk_mq_unfreeze_queue(q);
mutex_lock(&sdev->state_mutex);
--
2.16.2
