linux-kernel - [PATCH 4.19 265/639] media: cx18: update *pos correctly in cx18_read

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Message-Id: <20200124093119.920321001@linuxfoundation.org>
Date:   Fri, 24 Jan 2020 10:27:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 265/639] media: cx18: update *pos correctly in cx18_read_pos()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 7afb0df554292dca7568446f619965fb8153085d ]

We should be updating *pos.  The current code is a no-op.

Fixes: 1c1e45d17b66 ("V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip")

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/pci/cx18/cx18-fileops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/cx18/cx18-fileops.c b/drivers/media/pci/cx18/cx18-fileops.c
index a3f44e30f8219..88c2f3bea2b61 100644
--- a/drivers/media/pci/cx18/cx18-fileops.c
+++ b/drivers/media/pci/cx18/cx18-fileops.c
@@ -484,7 +484,7 @@ static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf,
 
 	CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
 	if (rc > 0)
-		pos += rc;
+		*pos += rc;
 	return rc;
 }
 
-- 
2.20.1