[PATCH AUTOSEL 5.15 06/10] media: cec: core: don't set last_initiator if tx in progress

Sasha Levin
2023-06-15T11:43:18Z

From: Hans Verkuil <hverkuil-cisco@xs4all.nl>

[ Upstream commit 73af6c7511038249cad3d5f3b44bf8d78ac0f499 ]

When a message was received the last_initiator is set to 0xff.
This will force the signal free time for the next transmit
to that for a new initiator. However, if a new transmit is
already in progress, then don't set last_initiator, since
that's the initiator of the current transmit. Overwriting
this would cause the signal free time of a following transmit
to be that of the new initiator instead of a next transmit.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/cec/core/cec-adap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c
index 67776a0d31e8c..99ede1417d727 100644
--- a/drivers/media/cec/core/cec-adap.c
+++ b/drivers/media/cec/core/cec-adap.c
@@ -1086,7 +1086,8 @@ void cec_received_msg_ts(struct cec_adapter *adap,
mutex_lock(&adap->lock);
dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);

- adap->last_initiator = 0xff;
+ if (!adap->transmit_in_progress)
+ adap->last_initiator = 0xff;

/* Check if this message was for us (directed or broadcast). */
if (!cec_msg_is_broadcast(msg))
--
2.39.2