scsi: zfcp: clarify function argument name for trace tag string

v2.6.30 commit 5ffd51a5 ("[SCSI] zfcp: replace current ERP logging with
a more convenient version") changed trace record distinguishing from a
numerical ID to a 7 character string called "trace tag". While starting to
use function arguments with different type and semantics, it did not change
the argument name accordingly.

v2.6.38 commit ae0904f6 ("[SCSI] zfcp: Redesign of the debug tracing
for recovery actions.") renamed variable names "id" into "tag" but only
within zfcp_dbf.*, not within zfcp_erp.c.

This was a bit confusing since the remainder of zfcp does use the term
"trace tag". Also "id" is quite generic and it's not obvious for what.
Just unify it consistently and use the "dbf" prefix to relate the arguments
to the code in zfcp_dbf.*.
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/s390/scsi/zfcp_ext.h

@@ -59,14 +59,15 @@ extern void zfcp_dbf_scsi_eh(char *tag, struct zfcp_adapter *adapter,
 /* zfcp_erp.c */
 extern void zfcp_erp_set_adapter_status(struct zfcp_adapter *, u32);
 extern void zfcp_erp_clear_adapter_status(struct zfcp_adapter *, u32);
-extern void zfcp_erp_port_forced_no_port_dbf(char *id,
+extern void zfcp_erp_port_forced_no_port_dbf(char *dbftag,
 					     struct zfcp_adapter *adapter,
 					     u64 port_name, u32 port_id);
 extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, char *);
 extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, char *);
 extern void zfcp_erp_set_port_status(struct zfcp_port *, u32);
 extern void zfcp_erp_clear_port_status(struct zfcp_port *, u32);
-extern void zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id);
+extern void zfcp_erp_port_reopen(struct zfcp_port *port, int clear,
+				 char *dbftag);
 extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, char *);
 extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, char *);
 extern void zfcp_erp_set_lun_status(struct scsi_device *, u32);
@@ -79,7 +80,8 @@ extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
 extern void zfcp_erp_wait(struct zfcp_adapter *);
 extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
 extern void zfcp_erp_timeout_handler(struct timer_list *t);
-extern void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter, char *id);
+extern void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter,
+					char *dbftag);
 
 /* zfcp_fc.c */
 extern struct kmem_cache *zfcp_fc_req_cache;

drivers/s390/scsi/zfcp_qdio.c

@@ -4,7 +4,7 @@
  *
  * Setup and helper functions to access QDIO.
  *
- * Copyright IBM Corp. 2002, 2010
+ * Copyright IBM Corp. 2002, 2017
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -19,7 +19,7 @@ static bool enable_multibuffer = true;
 module_param_named(datarouter, enable_multibuffer, bool, 0400);
 MODULE_PARM_DESC(datarouter, "Enable hardware data router support (default on)");
 
-static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id,
+static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *dbftag,
 				    unsigned int qdio_err)
 {
 	struct zfcp_adapter *adapter = qdio->adapter;
@@ -28,12 +28,12 @@ static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id,
 
 	if (qdio_err & QDIO_ERROR_SLSB_STATE) {
 		zfcp_qdio_siosl(adapter);
-		zfcp_erp_adapter_shutdown(adapter, 0, id);
+		zfcp_erp_adapter_shutdown(adapter, 0, dbftag);
 		return;
 	}
 	zfcp_erp_adapter_reopen(adapter,
 				ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
-				ZFCP_STATUS_COMMON_ERP_FAILED, id);
+				ZFCP_STATUS_COMMON_ERP_FAILED, dbftag);
 }
 
 static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt)