qla2xxx: Prevent multiple firmware dump collection for ISP27XX.

For ISP27XX, driver will capture new firmware dump even if there is
one already collected. Prevent this from happening by checking
fw_dumped flag.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

drivers/scsi/qla2xxx/qla_dbg.c

@@ -60,7 +60,7 @@
  * |                              |                    | 0xb13c-0xb140  |
  * |                              |                    | 0xb149		|
  * | MultiQ                       |       0xc00c       |		|
- * | Misc                         |       0xd213       | 0xd016-0xd017	|
+ * | Misc                         |       0xd300       | 0xd016-0xd017	|
  * |                              |                    | 0xd021,0xd024	|
  * |                              |                    | 0xd025,0xd029	|
  * |                              |                    | 0xd02a,0xd02e	|

drivers/scsi/qla2xxx/qla_tmpl.c

@@ -947,6 +947,10 @@ qla27xx_fwdump(scsi_qla_host_t *vha, int hardware_locked)
 		ql_log(ql_log_warn, vha, 0xd01e, "fwdump buffer missing.\n");
 	else if (!vha->hw->fw_dump_template)
 		ql_log(ql_log_warn, vha, 0xd01f, "fwdump template missing.\n");
+	else if (vha->hw->fw_dumped)
+		ql_log(ql_log_warn, vha, 0xd300,
+		    "Firmware has been previously dumped (%p),"
+		    " -- ignoring request\n", vha->hw->fw_dump);
 	else
 		qla27xx_execute_fwdt_template(vha);