From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Mon, 12 Feb 2018 11:45:32 +0000 (-0500)
Subject: media: vivid: check if the cec_adapter is valid
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2fb28b075f80136b17c8aebb2c006a3502c628db;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

media: vivid: check if the cec_adapter is valid

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@vger.kernel.org>      # for v4.12 and up
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>
---

diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index f0f423c7ca41..6f6d4df1e8a8 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -858,7 +858,8 @@ int vidioc_g_edid(struct file *file, void *_fh,
 		return -EINVAL;
 	if (edid->start_block + edid->blocks > dev->edid_blocks)
 		edid->blocks = dev->edid_blocks - edid->start_block;
-	cec_set_edid_phys_addr(dev->edid, dev->edid_blocks * 128, adap->phys_addr);
+	if (adap)
+		cec_set_edid_phys_addr(dev->edid, dev->edid_blocks * 128, adap->phys_addr);
 	memcpy(edid->edid, dev->edid + edid->start_block * 128, edid->blocks * 128);
 	return 0;
 }