The cec_msg_set_reply_to() helper function never zeroed the
struct cec_msg flags field, this can cause unexpected behavior
if flags was uninitialized to begin with.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Fixes: 0dbacebede1e ("[media] cec: move the CEC framework out of staging and to media")
Cc: <stable@xxxxxxxxxxxxxxx>
---
include/uapi/linux/cec.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 894fffc66f2c..b2af1dddd4d7 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -132,6 +132,8 @@ static inline void cec_msg_init(struct cec_msg *msg,
* Set the msg destination to the orig initiator and the msg initiator to the
* orig destination. Note that msg and orig may be the same pointer, in which
* case the change is done in place.
+ *
+ * It also zeroes the reply, timeout and flags fields.
*/
static inline void cec_msg_set_reply_to(struct cec_msg *msg,
struct cec_msg *orig)
@@ -139,7 +141,9 @@ static inline void cec_msg_set_reply_to(struct cec_msg *msg,
/* The destination becomes the initiator and vice versa */
msg->msg[0] = (cec_msg_destination(orig) << 4) |
cec_msg_initiator(orig);
- msg->reply = msg->timeout = 0;
+ msg->reply = 0;
+ msg->timeout = 0;
+ msg->flags = 0;
}
/**
--
2.43.0
