From: Marek Roszko <mark.ros...@gmail.com>
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.ros...@gmail.com>
Acked-by: Leilei Zhao <leilei.z...@atmel.com>
Cc: <sta...@vger.kernel.org> # v3.12
Signed-off-by: Nicolas Ferre <nicolas.fe...@atmel.com>
---
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
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