| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.18 071/228] media: ov772x: add checks for register read errors | Date | Tue, 2 Oct 2018 06:22:48 -0700 |
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4.18-stable review patch. If anyone has any objections, please let me know.
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From: Akinobu Mita <akinobu.mita@gmail.com>
[ Upstream commit 30f3b17eaf4913e9e56be15915ce57aae69db701 ]
This change adds checks for register read errors and returns correct error code.
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Hans Verkuil <hans.verkuil@cisco.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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:
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