V4L/DVB (9277): gspca: propagate an error in m5602_start_transfer()

Signed-off-by: Erik Andren <erik.andren@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c
index 19d5e35..a7021fc 100644 (file)
--- a/drivers/media/video/gspca/m5602/m5602_core.c
+++ b/drivers/media/video/gspca/m5602/m5602_core.c
@@ -146,16 +146,18 @@ static int m5602_start_transfer(struct gspca_dev *gspca_dev)
 {
        struct sd *sd = (struct sd *) gspca_dev;
        __u8 *buf = sd->gspca_dev.usb_buf;
+       int err;
 
        /* Send start command to the camera */
        const u8 buffer[4] = {0x13, 0xf9, 0x0f, 0x01};
        memcpy(buf, buffer, sizeof(buffer));
-       usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0),
-                       0x04, 0x40, 0x19, 0x0000, buf,
-                       4, M5602_URB_MSG_TIMEOUT);
+       err = usb_control_msg(gspca_dev->dev,
+                             usb_sndctrlpipe(gspca_dev->dev, 0),
+                             0x04, 0x40, 0x19, 0x0000, buf,
+                             4, M5602_URB_MSG_TIMEOUT);
 
        PDEBUG(DBG_V4L2, "Transfer started");
-       return 0;
+       return (err < 0) ? err : 0;
 }
 
 static void m5602_urb_complete(struct gspca_dev *gspca_dev,