[SCSI] qla2xxx: Fix for handling some error conditions in loopback.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_bsg.c

@@ -568,9 +568,17 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
 	if (!wait_for_completion_timeout(&ha->dcbx_comp, (20 * HZ))) {
 		ql_dbg(ql_dbg_user, vha, 0x7022,
 		    "State change notification not received.\n");
-	} else
-		ql_dbg(ql_dbg_user, vha, 0x7023,
-		    "State change received.\n");
+		rval = -EINVAL;
+	} else {
+		if (ha->flags.idc_compl_status) {
+			ql_dbg(ql_dbg_user, vha, 0x70c3,
+			    "Bad status in IDC Completion AEN\n");
+			rval = -EINVAL;
+			ha->flags.idc_compl_status = 0;
+		} else
+			ql_dbg(ql_dbg_user, vha, 0x7023,
+			    "State change received.\n");
+	}
 
 	ha->notify_dcbx_comp = 0;
 

drivers/scsi/qla2xxx/qla_dbg.c

@@ -22,7 +22,7 @@
  * | Async Events                 |       0x5071       | 0x502b-0x502f  |
  * |                              |                    | 0x5047,0x5052  |
  * | Timer Routines               |       0x6011       |                |
- * | User Space Interactions      |       0x70c2       | 0x7018,0x702e, |
+ * | User Space Interactions      |       0x70c3       | 0x7018,0x702e, |
  * |                              |                    | 0x7039,0x7045, |
  * |                              |                    | 0x7073-0x7075, |
  * |                              |                    | 0x708c,        |

drivers/scsi/qla2xxx/qla_def.h

@@ -2622,7 +2622,8 @@ struct qla_hw_data {
 		uint32_t	nic_core_reset_owner:1;
 		uint32_t	isp82xx_no_md_cap:1;
 		uint32_t	host_shutting_down:1;
-		/* 30 bits */
+		uint32_t	idc_compl_status:1;
+		/* 32 bits */
 	} flags;
 
 	/* This spinlock is used to protect "io transactions", you must

drivers/scsi/qla2xxx/qla_isr.c

@@ -294,17 +294,20 @@ qla81xx_idc_event(scsi_qla_host_t *vha, uint16_t aen, uint16_t descr)
 	    "%04x %04x %04x %04x %04x %04x %04x.\n",
 	    event[aen & 0xff], mb[0], mb[1], mb[2], mb[3],
 	    mb[4], mb[5], mb[6]);
+	if ((aen == MBA_IDC_COMPLETE && mb[1] >> 15)) {
+		vha->hw->flags.idc_compl_status = 1;
+		if (vha->hw->notify_dcbx_comp)
+			complete(&vha->hw->dcbx_comp);
+	}
 
-	if (IS_QLA81XX(vha->hw)) {
-		/* Acknowledgement needed? [Notify && non-zero timeout]. */
-		timeout = (descr >> 8) & 0xf;
-		if (aen != MBA_IDC_NOTIFY || !timeout)
-			return;
+	/* Acknowledgement needed? [Notify && non-zero timeout]. */
+	timeout = (descr >> 8) & 0xf;
+	if (aen != MBA_IDC_NOTIFY || !timeout)
+		return;
 
-		ql_dbg(ql_dbg_async, vha, 0x5022,
-		    "%lu Inter-Driver Communication %s -- ACK timeout=%d.\n",
-		    vha->host_no, event[aen & 0xff], timeout);
-	}
+	ql_dbg(ql_dbg_async, vha, 0x5022,
+	    "%lu Inter-Driver Communication %s -- ACK timeout=%d.\n",
+	    vha->host_no, event[aen & 0xff], timeout);
 
 	rval = qla2x00_post_idc_ack_work(vha, mb);
 	if (rval != QLA_SUCCESS)
@@ -989,13 +992,11 @@ qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 			if ((mb[2] & 0x7fff) == MBC_PORT_RESET ||
 			    (mb[2] & 0x7fff) == MBC_SET_PORT_CONFIG) {
 				set_bit(ISP_QUIESCE_NEEDED, &vha->dpc_flags);
-				/* Ack that we have quiesced I/O */
-				qla81xx_idc_event(vha, mb[0], mb[1]);
 				qla2xxx_wake_dpc(vha);
 			}
 	case MBA_IDC_COMPLETE:
 	case MBA_IDC_TIME_EXT:
-		if (IS_QLA81XX(vha->hw))
+		if (IS_QLA81XX(vha->hw) || IS_QLA8031(vha->hw))
 			qla81xx_idc_event(vha, mb[0], mb[1]);
 		break;