From 995234da19b927f42722d796e8270384f33be11c Mon Sep 17 00:00:00 2001 From: Eric Miao <eric.miao@linaro.org> Date: Fri, 23 Dec 2011 05:39:27 +0800 Subject: [PATCH] tty: serial: imx: move del_timer_sync() to avoid potential deadlock del_timer_sync() acquires its own lock and doesn't have to be nested within the spinlock of sport->port.lock in imx_set_termios(), which will cause potential deadlock. Fix this by moving it outside. Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Eric Miao <eric.miao@linaro.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/tty/serial/imx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 6b98a524eca2..0b7fed746b27 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -932,6 +932,8 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, ucr2 |= UCR2_PROE; } + del_timer_sync(&sport->timer); + /* * Ask the core to calculate the divisor for us. */ @@ -962,8 +964,6 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, sport->port.ignore_status_mask |= URXD_OVRRUN; } - del_timer_sync(&sport->timer); - /* * Update the per-port timeout. */