From 7ce9fc5ecde0d8bd64c29baee6c5e3ce7074ec9a Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Tue, 25 May 2021 13:18:09 -0500 Subject: scsi: iscsi: Flush block work before unblock 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@oracle.com Fixes: 1d726aa6ef57 ("scsi: iscsi: Optimize work queue flush use") Reviewed-by: Lee Duncan Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi_transport_iscsi.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/scsi/scsi_transport_iscsi.c') diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 909134b9c313..b07105ae7c91 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 -- cgit v1.2.3-59-g8ed1b