[media] gspca/sn9c20x: Test if sensor is a OV sensor
Instead of just assuming a ov9650 sensor based on USB ID,
double-check it, by reading the sensor ID.
Acked-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
index 6b155ae..1e0f219 100644
--- a/drivers/media/video/gspca/sn9c20x.c
+++ b/drivers/media/video/gspca/sn9c20x.c
@@ -1224,8 +1224,17 @@
static int ov9650_init_sensor(struct gspca_dev *gspca_dev)
{
int i;
+ u16 id;
struct sd *sd = (struct sd *) gspca_dev;
+ if (i2c_r2(gspca_dev, 0x1c, &id) < 0)
+ return -EINVAL;
+
+ if (id != 0x7fa2) {
+ err("sensor id for ov9650 doesn't match (0x%04x)", id);
+ return -ENODEV;
+ }
+
for (i = 0; i < ARRAY_SIZE(ov9650_init); i++) {
if (i2c_w1(gspca_dev, ov9650_init[i].reg,
ov9650_init[i].val) < 0) {