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authorPeter Hurley <peter@hurleysoftware.com>2013-01-30 12:43:52 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-02-04 15:40:29 -0800
commit80cace72566633bb99da1f022f71d3dac3498b02 (patch)
tree3f23619bc0f1bf0625fce0c9d4bbc89b484077e3 /drivers/tty
parent7be88b4ccb62737abe4bf27f9e66e224a70a12c4 (diff)
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 <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/pty.c2
1 files changed, 1 insertions, 1 deletions
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);