From: Peter Hurley Date: Wed, 30 Jan 2013 17:43:52 +0000 (-0500) Subject: pty: Ignore slave open count for master pty open X-Git-Tag: firefly_0821_release~3680^2~1078^2~31 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=80cace72566633bb99da1f022f71d3dac3498b02;p=firefly-linux-kernel-4.4.55.git 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: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d38455fab4b7..c24b4db243b9 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -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);