[SCSI] zfcp: Replace config semaphore with mutex

The config semaphore is only used as a mutex, so replace it with a
simple mutex.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/s390/scsi/zfcp_fc.c

@@ -613,7 +613,7 @@ static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
 		return -E2BIG;
 	}
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 
 	/* first entry is the header */
 	for (x = 1; x < max_entries && !last; x++) {
@@ -647,7 +647,7 @@ static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
 	zfcp_erp_wait(adapter);
 	list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
 		zfcp_fc_validate_port(port);
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return ret;
 }