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scsi: qla2xxx: Prevent PRLI in target mode

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In a case when the initiator in P2P mode by some circumstances does not
send PRLI, the target, in a case when the target port's WWPN is less than
initiator's, changes the discovery state in DSC_GNL. When gnl completes it
sends PRLI to the initiator.

Usually the initiator in P2P mode always sends PRLI. We caught this issue
on Linux stable v5.4.6 https://www.spinics.net/lists/stable/msg458515.html.

Fix this particular corner case in the behaviour of the P2P mod target
login state machine.

Link: https://lore.kernel.org/r/20210422153414.4022-1-a.kovaleva@yadro.com
Fixes: a9ed06d4e6 ("scsi: qla2xxx: Allow PLOGI in target mode")
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Anastasia Kovaleva <a.kovaleva@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Anastasia Kovaleva 2021-04-22 18:34:14 +03:00 committed by Martin K. Petersen
parent 000e68faef
commit fcb16d9a8e
1 changed files with 3 additions and 0 deletions
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3
drivers/scsi/qla2xxx/qla_init.c
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@ -1195,6 +1195,9 @@ static int qla24xx_post_prli_work(struct scsi_qla_host *vha, fc_port_t *fcport)
{
struct qla_work_evt *e;
if (vha->host->active_mode == MODE_TARGET)
return QLA_FUNCTION_FAILED;
e = qla2x00_alloc_work(vha, QLA_EVT_PRLI);
if (!e)
return QLA_FUNCTION_FAILED;