media: uapi/linux/cec.h: cec_msg_set_reply_to: zero flags

Commit Message

Hans Verkuil Aug. 7, 2024, 1:56 p.m. UTC

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 <[e-mail]>
Fixes: 0dbacebede1e ("[media] cec: move the CEC framework out of staging and to media")
Cc: <[e-mail]>
---
Resending this patch to check if patchwork is up and running again.
---
 include/uapi/linux/cec.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch

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;
 }

 /**