Commit b1d679af authored May 09, 2012 by Alan Cox Committed by Greg Kroah-Hartman May 09, 2012

tty: drop the pty lock during hangup



In theory we don't need it, in practice we are hitting some ill understood
deadlock when we don't drop it. The old code dropped it here so we are not
undoing anything problematic for pty. If pty could be unloaded it would be
a problem but it can't.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent fd11b42e

drivers/tty/pty.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -63,7 +63,9 @@ static void pty_close(struct tty_struct tty, struct file filp)
		mutex_unlock(&devpts_mutex);
		}
		#endif
		tty_unlock(tty);
		tty_vhangup(tty->link);
		tty_lock(tty);
		}
		}