From: Marek Roszko <mark.roszko@xxxxxxxxx> Something asks a tasklet to be scheduled when the uart port is closed. Need to supress the kernel panic for now by checking if the port is NULL or not. Signed-off-by: Marek Roszko <mark.roszko@xxxxxxxxx> Acked-by: Leilei Zhao <leilei.zhao@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # v3.12 Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> --- drivers/tty/serial/atmel_serial.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index c421d11b3d4c..6e68486c83cb 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -1360,6 +1360,10 @@ static void atmel_tasklet_func(unsigned long data) unsigned int status; unsigned int status_change; + if(!port->state || !port->state->port.tty) + /* uart has been closed */ + return; + /* The interrupt handler does not take the lock */ spin_lock(&port->lock); -- 1.8.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
