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scsi: lpfc: Fix NVMe I/O failover to non-optimized path

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[ 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@gmail.com
Fixes: 0614568361b0 ("scsi: lpfc: Delay unregistering from transport until GIDFT or ADISC completes")
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
James Smart 2021-09-10 16:31:52 -07:00 committed by Greg Kroah-Hartman
parent 79becd68e1
commit ca4e260667
1 changed files with 1 additions and 0 deletions
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drivers/scsi/lpfc/lpfc_els.c
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@ -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;
}