caif: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.

Cc: Richard Fontana <[e-mail]>
Cc: Steve Winslow <[e-mail]>
Cc: [e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/caif/caif_serial.c

···
 }
 static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
 {
-	ser->debugfs_tty_dir =
-			debugfs_create_dir(tty->name, debugfsdir);
-	if (!IS_ERR(ser->debugfs_tty_dir)) {
-		debugfs_create_blob("last_tx_msg", 0400,
-				    ser->debugfs_tty_dir,
-				    &ser->tx_blob);
+	ser->debugfs_tty_dir = debugfs_create_dir(tty->name, debugfsdir);
 
-		debugfs_create_blob("last_rx_msg", 0400,
-				    ser->debugfs_tty_dir,
-				    &ser->rx_blob);
+	debugfs_create_blob("last_tx_msg", 0400, ser->debugfs_tty_dir,
+			    &ser->tx_blob);
 
-		debugfs_create_x32("ser_state", 0400,
-				   ser->debugfs_tty_dir,
-				   (u32 *)&ser->state);
+	debugfs_create_blob("last_rx_msg", 0400, ser->debugfs_tty_dir,
+			    &ser->rx_blob);
 
-		debugfs_create_x8("tty_status", 0400,
-				  ser->debugfs_tty_dir,
-				  &ser->tty_status);
+	debugfs_create_x32("ser_state", 0400, ser->debugfs_tty_dir,
+			   (u32 *)&ser->state);
 
-	}
+	debugfs_create_x8("tty_status", 0400, ser->debugfs_tty_dir,
+			  &ser->tty_status);
+
 	ser->tx_blob.data = ser->tx_data;
 	ser->tx_blob.size = 0;
 	ser->rx_blob.data = ser->rx_data;

drivers/net/caif/caif_virtio.c

···
 /* Create debugfs counters for the device */
 static inline void debugfs_init(struct cfv_info *cfv)
 {
-	cfv->debugfs =
-		debugfs_create_dir(netdev_name(cfv->ndev), NULL);
-
-	if (IS_ERR(cfv->debugfs))
-		return;
+	cfv->debugfs = debugfs_create_dir(netdev_name(cfv->ndev), NULL);
 
 	debugfs_create_u32("rx-napi-complete", 0400, cfv->debugfs,
 			   &cfv->stats.rx_napi_complete);