diff options
| author | Eric Miao <eric.miao@linaro.org> | 2011-12-23 05:39:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-04 16:30:36 -0800 |
| commit | 995234da19b927f42722d796e8270384f33be11c (patch) | |
| tree | 022d3696bb38afa1486b2962ba3f51458b35b21b | |
| parent | 01f56abd089dd216e537817b61497c58bb66aab3 (diff) | |
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>
| -rw-r--r-- | drivers/tty/serial/imx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 6b98a524eca..0b7fed746b2 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. */ |