5.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bart Van Assche <bvanassche@xxxxxxx>
commit 17605afaae825b0291f80c62a7f6565879edaa8a upstream.
Since scsi_device_quiesce() skips SCSI devices that have another state than
RUNNING, OFFLINE or TRANSPORT_OFFLINE, scsi_device_resume() should not
complain about SCSI devices that have been skipped. Hence this patch. This
patch avoids that the following warning appears during resume:
WARNING: CPU: 3 PID: 1039 at blk_clear_pm_only+0x2a/0x30
CPU: 3 PID: 1039 Comm: kworker/u8:49 Not tainted 5.0.0+ #1
Hardware name: LENOVO 4180F42/4180F42, BIOS 83ET75WW (1.45 ) 05/10/2013
Workqueue: events_unbound async_run_entry_fn
RIP: 0010:blk_clear_pm_only+0x2a/0x30
Call Trace:
? scsi_device_resume+0x28/0x50
? scsi_dev_type_resume+0x2b/0x80
? async_run_entry_fn+0x2c/0xd0
? process_one_work+0x1f0/0x3f0
? worker_thread+0x28/0x3c0
? process_one_work+0x3f0/0x3f0
? kthread+0x10c/0x130
? __kthread_create_on_node+0x150/0x150
? ret_from_fork+0x1f/0x30
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
Cc: Martin Steigerwald <martin@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Reported-by: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx>
Tested-by: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx>
Fixes: 3a0a529971ec ("block, scsi: Make SCSI quiesce and resume work reliably") # v4.15
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2598,8 +2598,10 @@ void scsi_device_resume(struct scsi_devi
* device deleted during suspend)
*/
mutex_lock(&sdev->state_mutex);
- sdev->quiesced_by = NULL;
- blk_clear_pm_only(sdev->request_queue);
+ if (sdev->quiesced_by) {
+ sdev->quiesced_by = NULL;
+ blk_clear_pm_only(sdev->request_queue);
+ }
if (sdev->sdev_state == SDEV_QUIESCE)
scsi_device_set_state(sdev, SDEV_RUNNING);
mutex_unlock(&sdev->state_mutex);
