linux-kernel - [PATCH AUTOSEL for 4.9 53/56] [media] cec: CEC_MSG_GIVE_FEATURES should abort for CEC version

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Message-ID: <20171115024521.5884-53-alexander.levin@verizon.com>
Date:   Wed, 15 Nov 2017 02:45:47 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Hans Verkuil <hansverk@...co.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 53/56] [media] cec: CEC_MSG_GIVE_FEATURES
 should abort for CEC version < 2

From: Hans Verkuil <hansverk@...co.com>

[ Upstream commit a24f56d47930492c94ef6875bf45adf7607ca1a4 ]

This is a 2.0 only message, so it should return Feature Abort if the
adapter is configured for CEC version 1.4.

Right now it does nothing, which means that the sender will time out.

Signed-off-by: Hans Verkuil <hansverk@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/staging/media/cec/cec-adap.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/media/cec/cec-adap.c b/drivers/staging/media/cec/cec-adap.c
index d1f186745ff9..9bdc04a2aa6c 100644
--- a/drivers/staging/media/cec/cec-adap.c
+++ b/drivers/staging/media/cec/cec-adap.c
@@ -1557,9 +1557,9 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 	}
 
 	case CEC_MSG_GIVE_FEATURES:
-		if (adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0)
-			return cec_report_features(adap, la_idx);
-		return 0;
+		if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
+			return cec_feature_abort(adap, msg);
+		return cec_report_features(adap, la_idx);
 
 	default:
 		/*
-- 
2.11.0