scsi: zfcp: Simplify workqueue allocation

alloc_ordered_workqueue() accepts a format string and format arguments as
part of the call, so there is no need for the indirection of first using
snprintf() to print the name into an local array, and then passing that
array to the allocation call.

Also make the error-/non-error-case handling more canonical in that the
error case is tested in the 'if' that follows the allocation call, and
the default return value of the function is '0'.

Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: M Nikhil <nikh1092@linux.ibm.com>
Reviewed-by: Nihar Panda <niharp@linux.ibm.com>
Signed-off-by: Nihar Panda <niharp@linux.ibm.com>
Link: https://lore.kernel.org/r/20250507042854.3607038-3-niharp@linux.ibm.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Benjamin-Block

drivers/s390/scsi/zfcp_aux.c

@@ -312,15 +312,13 @@ static void zfcp_print_sl(struct seq_file *m, struct service_level *sl)
 
 static int zfcp_setup_adapter_work_queue(struct zfcp_adapter *adapter)
 {
-	char name[TASK_COMM_LEN];
-
-	snprintf(name, sizeof(name), "zfcp_q_%s",
-		 dev_name(&adapter->ccw_device->dev));
-	adapter->work_queue = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
+	adapter->work_queue =
+		alloc_ordered_workqueue("zfcp_q_%s", WQ_MEM_RECLAIM,
+					dev_name(&adapter->ccw_device->dev));
+	if (!adapter->work_queue)
+		return -ENOMEM;
 
-	if (adapter->work_queue)
-		return 0;
-	return -ENOMEM;
+	return 0;
 }
 
 static void zfcp_destroy_adapter_work_queue(struct zfcp_adapter *adapter)