[media] lirc: fix null dereference for tx-only devices

tx-only RC devices do not have a receive buffer.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index e0e2297..0030ce0 100644 (file)
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -468,7 +468,7 @@ int lirc_dev_fop_open(struct inode *inode, struct file *file)
                if (retval) {
                        module_put(cdev->owner);
                        ir->open--;
-               } else {
+               } else if (ir->buf) {
                        lirc_buffer_clear(ir->buf);
                }
                if (ir->task)