scsi: qla2xxx: Check if FW supports MQ before enabling

OS boot during Boot from SAN was stuck at dracut emergency shell after
enabling NVMe driver parameter. For non-MQ support the driver was enabling
MQ. Add a check to confirm if FW supports MQ.

Link: https://lore.kernel.org/r/20200806111014.28434-9-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 9b59f03..fda812b 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2017,6 +2017,11 @@ skip_pio:
        /* Determine queue resources */
        ha->max_req_queues = ha->max_rsp_queues = 1;
        ha->msix_count = QLA_BASE_VECTORS;
+
+       /* Check if FW supports MQ or not */
+       if (!(ha->fw_attributes & BIT_6))
+               goto mqiobase_exit;
+
        if (!ql2xmqsupport || !ql2xnvmeenable ||
            (!IS_QLA25XX(ha) && !IS_QLA81XX(ha)))
                goto mqiobase_exit;