This is a note to let you know that I've just added the patch titled
scsi: lpfc: Fix NVMe I/O failover to non-optimized path
to the 5.15-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-lpfc-fix-nvme-i-o-failover-to-non-optimized-pat.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3e64c3b56245926108f1b202068d76ee145c0beb
Author: James Smart <jsmart2021@xxxxxxxxx>
Date: Fri Sep 10 16:31:52 2021 -0700
scsi: lpfc: Fix NVMe I/O failover to non-optimized path
[ Upstream commit b507357f79171fb4fb4e732ca43a1f30bc5aab1d ]
Currently, we hold off unregistering with NVMe transport layer until GID_FT
or ADISC completes upon receipt of RSCN. In the ADISC discovery routine,
for nodes not found in the GID_FT response, the nodes are unregistered from
the SCSI transport but not UNREG_RPI'd. Meaning outstanding WQEs continue
to be outstanding and were not failed back to the OS. If an NVMe device,
this mean there wasn't initial termination of the I/Os so they could be
issued on a different NVMe path.
Fix by unregistering the RPI so that I/O is cancelled.
Link: https://lore.kernel.org/r/20210910233159.115896-8-jsmart2021@xxxxxxxxx
Fixes: 0614568361b0 ("scsi: lpfc: Delay unregistering from transport until GIDFT or ADISC completes")
Co-developed-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 0a68e565147a7..666b0a1b558ac 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -6215,6 +6215,7 @@ lpfc_els_disc_adisc(struct lpfc_vport *vport)
* from backend
*/
lpfc_nlp_unreg_node(vport, ndlp);
+ lpfc_unreg_rpi(vport, ndlp);
continue;
}
