diff mbox

[4/4,media] lirc: fix null dereference for tx-only devices

Message ID 2bcb8057c7cc8ad3af4f4359a9ca476fa4ee09df.1484916689.git.sean@mess.org (mailing list archive)
State New, archived
Headers show

Commit Message

Sean Young Jan. 20, 2017, 1:08 p.m. UTC 
tx-only RC devices do not have a receive buffer.

Signed-off-by: Sean Young <sean@mess.org>
---
 drivers/media/rc/lirc_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index 7f5d109..18b4dae 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -472,7 +472,7 @@  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)