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Date: Wed, 09 May 2012 17:03:19 +0100 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: greg@...ah.com, linux-kernel@...r.kernel.org Subject: [PATCH] tty: drop the pty lock during hangup From: Alan Cox <alan@...ux.intel.com> 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@...ux.intel.com> --- drivers/tty/pty.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d6fa842..59af394 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -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); } } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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