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scsi: qla2xxx: Add logic to detect ABTS hang and response completion

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ABTS error completion can trigger an exchange cleanup from the driver and
another ABTS response will be generated.  This retry of ABTS response can
cause loop between driver trying to send ABTS and firmware returning error.

This patch fixes this issue by adding logic to check for unresolved exchanges
and clean up before ABTS is retried.  This patch also addes the fix to use the
same qpair as the ABTS completion for the terminatation of exchange as well as
retry of ABTS response.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran
2018-09-04 14:19:12 -07:00
committed by Martin K. Petersen
parent 079a3a3b9d
commit 0691094ff3
3 changed files with 67 additions and 9 deletions
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drivers/scsi/qla2xxx/qla_os.c
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@@ -391,6 +391,7 @@ static void qla_init_base_qpair(struct scsi_qla_host *vha, struct req_que *req,
struct qla_hw_data *ha = vha->hw;
rsp->qpair = ha->base_qpair;
rsp->req = req;
ha->base_qpair->hw = ha;
ha->base_qpair->req = req;
ha->base_qpair->rsp = rsp;
ha->base_qpair->vha = vha;