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Commit 80cace72 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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pty: Ignore slave open count for master pty open 



Multiple slave pty opens may be performed in parallel with the
master open. Of course, all the slave opens will fail because the
master pty is still locked but during this time the slave pty
count will be artificially greater than 1. This is should not
cause the master pty open to fail.

Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7be88b4c

drivers/tty/pty.c

+1 −1
Original line number Diff line number Diff line
@@ -256,7 +256,7 @@ static int pty_open(struct tty_struct *tty, struct file *filp) 
		goto out;

	if (test_bit(TTY_PTY_LOCK, &tty->link->flags))

		goto out;

	if (tty->link->count != 1)

	if (tty->driver->subtype == PTY_TYPE_SLAVE && tty->link->count != 1)

		goto out;



	clear_bit(TTY_IO_ERROR, &tty->flags);