media: gspca: mt9m111: Check write_bridge for timeout

In mt9m111_probe, m5602_write_bridge can timeout and return a negative
error value. The fix checks for this error and passes it upstream.
Signed-off-by: NAditya Pakki <pakki001@umn.edu>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/usb/gspca/m5602/m5602_mt9m111.c

@@ -199,7 +199,7 @@ static const struct v4l2_ctrl_config mt9m111_greenbal_cfg = {
 int mt9m111_probe(struct sd *sd)
 {
 	u8 data[2] = {0x00, 0x00};
-	int i;
+	int i, rc = 0;
 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 
 	if (force_sensor) {
@@ -217,16 +217,18 @@ 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,
+			rc |= 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,
+			rc |= m5602_write_sensor(sd,
 				preinit_mt9m111[i][1], data, 2);
 		}
 	}
+	if (rc < 0)
+		return rc;
 
 	if (m5602_read_sensor(sd, MT9M111_SC_CHIPVER, data, 2))
 		return -ENODEV;