4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
[ Upstream commit 30f3b17eaf4913e9e56be15915ce57aae69db701 ]
This change adds checks for register read errors and returns correct
error code.
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Reviewed-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/i2c/ov772x.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
--- a/drivers/media/i2c/ov772x.c
+++ b/drivers/media/i2c/ov772x.c
@@ -1136,7 +1136,7 @@ static int ov772x_set_fmt(struct v4l2_su
static int ov772x_video_probe(struct ov772x_priv *priv)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
- u8 pid, ver;
+ int pid, ver, midh, midl;
const char *devname;
int ret;
@@ -1146,7 +1146,11 @@ static int ov772x_video_probe(struct ov7
/* Check and show product ID and manufacturer ID. */
pid = ov772x_read(client, PID);
+ if (pid < 0)
+ return pid;
ver = ov772x_read(client, VER);
+ if (ver < 0)
+ return ver;
switch (VERSION(pid, ver)) {
case OV7720:
@@ -1162,13 +1166,17 @@ static int ov772x_video_probe(struct ov7
goto done;
}
+ midh = ov772x_read(client, MIDH);
+ if (midh < 0)
+ return midh;
+ midl = ov772x_read(client, MIDL);
+ if (midl < 0)
+ return midl;
+
dev_info(&client->dev,
"%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
- devname,
- pid,
- ver,
- ov772x_read(client, MIDH),
- ov772x_read(client, MIDL));
+ devname, pid, ver, midh, midl);
+
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
