Patch "media: cec: Respond to unregistered initiators, when applicable" has been added to the 4.13-stable tree

Patch "media: cec: Respond to unregistered initiators, when applicable" has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: cec: Respond to unregistered initiators, when applicable

to the 4.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-cec-respond-to-unregistered-initiators-when-applicable.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 845d6524d69b40bd6abd61dc1264a8657159aa55 Mon Sep 17 00:00:00 2001
From: Jose Abreu <Jose.Abreu@synopsys.com>
Date: Thu, 14 Sep 2017 11:23:38 -0400
Subject: media: cec: Respond to unregistered initiators, when applicable

From: Jose Abreu <Jose.Abreu@synopsys.com>

commit 845d6524d69b40bd6abd61dc1264a8657159aa55 upstream.

Running CEC 1.4 compliance test we get the following error on test
11.1.6.2: "ERROR: The DUT did not broadcast a
<Report Physical Address> message to the unregistered device."

Fix this by letting GIVE_PHYSICAL_ADDR message respond to unregistered
device. Also, GIVE_DEVICE_VENDOR_ID and GIVE_FEATURES fall in the
same category so, respond also to these messages.

With this fix we pass CEC 1.4 official compliance.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/cec/cec-adap.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -1726,12 +1726,19 @@ static int cec_receive_notify(struct cec
 	 */
 	switch (msg->msg[1]) {
 	case CEC_MSG_GET_CEC_VERSION:
-	case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
 	case CEC_MSG_ABORT:
 	case CEC_MSG_GIVE_DEVICE_POWER_STATUS:
-	case CEC_MSG_GIVE_PHYSICAL_ADDR:
 	case CEC_MSG_GIVE_OSD_NAME:
+		/*
+		 * These messages reply with a directed message, so ignore if
+		 * the initiator is Unregistered.
+		 */
+		if (!adap->passthrough && from_unregistered)
+			return 0;
+		/* Fall through */
+	case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
 	case CEC_MSG_GIVE_FEATURES:
+	case CEC_MSG_GIVE_PHYSICAL_ADDR:
 		/*
 		 * Skip processing these messages if the passthrough mode
 		 * is on.
@@ -1739,7 +1746,7 @@ static int cec_receive_notify(struct cec
 		if (adap->passthrough)
 			goto skip_processing;
 		/* Ignore if addressing is wrong */
-		if (is_broadcast || from_unregistered)
+		if (is_broadcast)
 			return 0;
 		break;
 


Patches currently in stable-queue which might be from Jose.Abreu@synopsys.com are

queue-4.13/media-cec-respond-to-unregistered-initiators-when-applicable.patch