V4L/DVB (8361): gspca: Bad check of i2c write to sn9c10x.

Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/gspca/sonixb.c

@@ -456,9 +456,12 @@ static int i2c_w(struct gspca_dev *gspca_dev, const __u8 *buffer)
 	while (retry--) {
 		msleep(10);
 		reg_r(gspca_dev, 0x08);
-		if (gspca_dev->usb_buf[0] == 4)
+		if (gspca_dev->usb_buf[0] & 0x04) {
+			if (gspca_dev->usb_buf[0] & 0x08)
+				return -1;
 			return 0;
 		}
+	}
 	return -1;
 }