This is a note to let you know that I've just added the patch titled scsi: iscsi: Flush block work before unblock to the 5.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-iscsi-flush-block-work-before-unblock.patch and it can be found in the queue-5.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 5b3cf57da1a358b41ca11453c94d7313e4b31f9b Author: Mike Christie <michael.christie@xxxxxxxxxx> Date: Tue May 25 13:18:09 2021 -0500 scsi: iscsi: Flush block work before unblock [ Upstream commit 7ce9fc5ecde0d8bd64c29baee6c5e3ce7074ec9a ] We set the max_active iSCSI EH works to 1, so all work is going to execute in order by default. However, userspace can now override this in sysfs. If max_active > 1, we can end up with the block_work on CPU1 and iscsi_unblock_session running the unblock_work on CPU2 and the session and target/device state will end up out of sync with each other. This adds a flush of the block_work in iscsi_unblock_session. Link: https://lore.kernel.org/r/20210525181821.7617-17-michael.christie@xxxxxxxxxx Fixes: 1d726aa6ef57 ("scsi: iscsi: Optimize work queue flush use") Reviewed-by: Lee Duncan <lduncan@xxxxxxxx> Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index b8a93e607891..6ce1cc992d1d 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -1969,6 +1969,8 @@ static void __iscsi_unblock_session(struct work_struct *work) */ void iscsi_unblock_session(struct iscsi_cls_session *session) { + flush_work(&session->block_work); + queue_work(iscsi_eh_timer_workq, &session->unblock_work); /* * Blocking the session can be done from any context so we only