]> git.baikalelectronics.ru Git - kernel.git/commit
scsi: lpfc: Fix retry of PRLI when status indicates its unsupported
authorDick Kennedy <dick.kennedy@broadcom.com>
Mon, 3 Aug 2020 21:02:26 +0000 (14:02 -0700)
committerMartin K. Petersen <martin.petersen@oracle.com>
Wed, 5 Aug 2020 00:56:57 +0000 (20:56 -0400)
commit1558586473ddef2837b7a2c58c0a6955ec184782
tree1dcef731df8f02fa50f3c3fbba3fa27aaa26e78c
parentc558db47592a08641ed3f2063b82c580034c55a6
scsi: lpfc: Fix retry of PRLI when status indicates its unsupported

With port bounce/address swaps and timing between initiator GID queries vs
remote port FC4 support registrations, the driver may be in a situation
where it sends PRLIs for both FCP and NVME even though the target may not
support one of the protocols. In this case, the remote port will reject the
PRLI and usually indicate it does not support the request. However, the
driver currently ignores the status of the failure and immediately retries
the PRLI, which is pointless. In the case of this one remote port, the
reception of the PRLI retry caused it to decide to send a LOGO.  The LOGO
restarted the process and the same results happened. It made the remote
port undiscoverable to either protocol.

Add logic to detect the non-support status and not attempt the retry
of the PRLI.

Link: https://lore.kernel.org/r/20200803210229.23063-6-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/scsi/lpfc/lpfc_els.c