tty: vcc: Drop impossible to hit WARN_ON

vcc_get() returns the port that has provided port->index. As the port that is about to be removed isn't removed yet this trivially will find this port. So simplify the call to not assign an identical value to the port pointer and drop the warning that is never hit. Reviewed-by: Jiri Slaby <[email protected]> Signed-off-by: Uwe Kleine-König <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
Rust-for-Linux · Jan 15, 2021 · 63e34e7 · 63e34e7
1 parent 6da629c
commit 63e34e7
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
@@ -692,12 +692,9 @@ static int vcc_remove(struct vio_dev *vdev)
 		tty_vhangup(port->tty);
 
 	/* Get exclusive reference to VCC, ensures that there are no other
-	 * clients to this port
+	 * clients to this port. This cannot fail.
 	 */
-	port = vcc_get(port->index, true);
-
-	if (WARN_ON(!port))
-		return -ENODEV;
+	vcc_get(port->index, true);
 
 	tty_unregister_device(vcc_tty_driver, port->index);