linux-kernel - [PATCH 4.9 03/32] media: vivid: check if the cec

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Message-Id: <20190502143316.137488919@linuxfoundation.org>
Date:   Thu,  2 May 2019 17:20:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>
Subject: [PATCH 4.9 03/32] media: vivid: check if the cec_adapter is valid

From: Hans Verkuil <hverkuil@...all.nl>

commit ed356f110403f6acc64dcbbbfdc38662ab9b06c2 upstream.

If CEC is not enabled for the vivid driver, then the adap pointer is NULL
and 'adap->phys_addr' will fail.

Cc: <stable@...r.kernel.org>      # for v4.12 and up
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
[ Naresh: Fixed rebase conflict ]
Signed-off-by: Naresh Kamboju <naresh.kamboju@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/platform/vivid/vivid-vid-common.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -841,6 +841,7 @@ int vidioc_g_edid(struct file *file, voi
 	if (edid->start_block + edid->blocks > dev->edid_blocks)
 		edid->blocks = dev->edid_blocks - edid->start_block;
 	memcpy(edid->edid, dev->edid, edid->blocks * 128);
-	cec_set_edid_phys_addr(edid->edid, edid->blocks * 128, adap->phys_addr);
+	if (adap)
+		cec_set_edid_phys_addr(edid->edid, edid->blocks * 128, adap->phys_addr);
 	return 0;
 }