[PATCH AUTOSEL 5.4 35/52] media: gspca: properly check for errors in po1030_probe()

From: Sasha Levin
Date: Mon May 24 2021 - 11:04:52 EST


From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

[ Upstream commit dacb408ca6f0e34df22b40d8dd5fae7f8e777d84 ]

If m5602_write_sensor() or m5602_write_bridge() fail, do not continue to
initialize the device but return the error to the calling funtion.

Cc: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210503115736.2104747-64-gregkh@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/usb/gspca/m5602/m5602_po1030.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/media/usb/gspca/m5602/m5602_po1030.c b/drivers/media/usb/gspca/m5602/m5602_po1030.c
index 7bdbb8065146..8fd99ceee4b6 100644
--- a/drivers/media/usb/gspca/m5602/m5602_po1030.c
+++ b/drivers/media/usb/gspca/m5602/m5602_po1030.c
@@ -155,6 +155,7 @@ static const struct v4l2_ctrl_config po1030_greenbal_cfg = {
int po1030_probe(struct sd *sd)
{
u8 dev_id_h = 0, i;
+ int err;
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;

if (force_sensor) {
@@ -173,10 +174,13 @@ int po1030_probe(struct sd *sd)
for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) {
u8 data = preinit_po1030[i][2];
if (preinit_po1030[i][0] == SENSOR)
- m5602_write_sensor(sd,
- preinit_po1030[i][1], &data, 1);
+ err = m5602_write_sensor(sd, preinit_po1030[i][1],
+ &data, 1);
else
- m5602_write_bridge(sd, preinit_po1030[i][1], data);
+ err = m5602_write_bridge(sd, preinit_po1030[i][1],
+ data);
+ if (err < 0)
+ return err;
}

if (m5602_read_sensor(sd, PO1030_DEVID_H, &dev_id_h, 1))
--
2.30.2