[SCSI] qla2xxx: fix for multiqueue in MISX disabled case

 Fix to accommodate a hardware bug in multiqueue mode that does not
 work properly when acknowledgement of MSIX Interrupts is disabled.

Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index a47d34308a3a..2a4c7f4e7b69 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -696,6 +696,10 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
         /* Use alternate PCI devfn */
         if (LSB(rsp->rid))
                 options |= BIT_5;
+        /* Enable MSIX handshake mode on for uncapable adapters */
+        if (!IS_MSIX_NACK_CAPABLE(ha))
+                options |= BIT_6;
+
         rsp->options = options;
         rsp->id = que_id;
         reg = ISP_QUE_REG(ha, que_id);