[PATCH 61/69] media: gspca: mt9m111: Check write_bridge for timeout

Greg Kroah-Hartman
2021-05-03T12:02:12Z

From: Alaa Emad <alaaemadhossney.ae@gmail.com>

If m5602_write_bridge times out, it will return a negative error value.
So properly check for this and handle the error correctly instead of
just ignoring it.

Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Alaa Emad <alaaemadhossney.ae@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/media/usb/gspca/m5602/m5602_mt9m111.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/media/usb/gspca/m5602/m5602_mt9m111.c b/drivers/media/usb/gspca/m5602/m5602_mt9m111.c
index 50481dc928d0..bf1af6ed9131 100644
--- a/drivers/media/usb/gspca/m5602/m5602_mt9m111.c
+++ b/drivers/media/usb/gspca/m5602/m5602_mt9m111.c
@@ -195,7 +195,7 @@ static const struct v4l2_ctrl_config mt9m111_greenbal_cfg = {
int mt9m111_probe(struct sd *sd)
{
u8 data[2] = {0x00, 0x00};
- int i;
+ int i, err;
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;

if (force_sensor) {
@@ -213,15 +213,17 @@ int mt9m111_probe(struct sd *sd)
/* Do the preinit */
for (i = 0; i < ARRAY_SIZE(preinit_mt9m111); i++) {
if (preinit_mt9m111[i][0] == BRIDGE) {
- m5602_write_bridge(sd,
- preinit_mt9m111[i][1],
- preinit_mt9m111[i][2]);
+ err = m5602_write_bridge(sd,
+ preinit_mt9m111[i][1],
+ preinit_mt9m111[i][2]);
} else {
data[0] = preinit_mt9m111[i][2];
data[1] = preinit_mt9m111[i][3];
- m5602_write_sensor(sd,
- preinit_mt9m111[i][1], data, 2);
+ err = m5602_write_sensor(sd,
+ preinit_mt9m111[i][1], data, 2);
}
+ if (err < 0)
+ return err;
}

if (m5602_read_sensor(sd, MT9M111_SC_CHIPVER, data, 2))
--
2.31.1