qla2xxx: Restore WWPN in case of Loop Dead.

For FA-WWPN capable device, ISP2031 and ISP27XX, when loop
dead is detected by a driver, restore WWPN from NVRAM.

Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/qla2xxx/qla_init.c

@@ -2202,6 +2202,11 @@ qla2x00_init_rings(scsi_qla_host_t *vha)
 		if (IS_DPORT_CAPABLE(ha))
 			mid_init_cb->init_cb.firmware_options_1 |=
 			    cpu_to_le16(BIT_7);
+		/* Enable FA-WWPN */
+		ha->flags.fawwpn_enabled =
+		    (mid_init_cb->init_cb.firmware_options_1 & BIT_6) ? 1 : 0;
+		ql_dbg(ql_dbg_init, vha, 0x0141, "FA-WWPN Support: %s.\n",
+		    (ha->flags.fawwpn_enabled) ? "enabled" : "disabled");
 	}
 
 	rval = qla2x00_init_firmware(vha, ha->init_cb_size);