[SCSI] qla4xxx: Dump HW/FW reg to figure out what caused FW to be hung for ISP82XX

Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

drivers/scsi/qla4xxx/ql4_os.c

@@ -679,7 +679,27 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
 		if (ha->seconds_since_last_heartbeat == 2) {
 			ha->seconds_since_last_heartbeat = 0;
 			halt_status = qla4_8xxx_rd_32(ha,
-			    QLA82XX_PEG_HALT_STATUS1);
+						      QLA82XX_PEG_HALT_STATUS1);
+
+			ql4_printk(KERN_INFO, ha,
+				   "scsi(%ld): %s, Dumping hw/fw registers:\n "
+				   " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2:"
+				   " 0x%x,\n PEG_NET_0_PC: 0x%x, PEG_NET_1_PC:"
+				   " 0x%x,\n PEG_NET_2_PC: 0x%x, PEG_NET_3_PC:"
+				   " 0x%x,\n PEG_NET_4_PC: 0x%x\n",
+				   ha->host_no, __func__, halt_status,
+				   qla4_8xxx_rd_32(ha,
+						   QLA82XX_PEG_HALT_STATUS2),
+				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_0 +
+						   0x3c),
+				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_1 +
+						   0x3c),
+				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_2 +
+						   0x3c),
+				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_3 +
+						   0x3c),
+				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 +
+						   0x3c));
 
 			/* Since we cannot change dev_state in interrupt
 			 * context, set appropriate DPC flag then wakeup