media: flexcop-usb: sanity checking of endpoint type

Make sure the endpoint is ISOC in and do not hard code USB_DIR_IN.
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/usb/b2c2/flexcop-usb.c

@@ -513,6 +513,8 @@ static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 
 	if (fc_usb->uintf->cur_altsetting->desc.bNumEndpoints < 1)
 		return -ENODEV;
+	if (!usb_endpoint_is_isoc_in(&fc_usb->uintf->cur_altsetting->endpoint[1].desc))
+		return -ENODEV;
 
 	switch (fc_usb->udev->speed) {
 	case USB_SPEED_LOW:

drivers/media/usb/b2c2/flexcop-usb.h

@@ -15,7 +15,7 @@
 
 #define B2C2_USB_CTRL_PIPE_IN usb_rcvctrlpipe(fc_usb->udev, 0)
 #define B2C2_USB_CTRL_PIPE_OUT usb_sndctrlpipe(fc_usb->udev, 0)
-#define B2C2_USB_DATA_PIPE usb_rcvisocpipe(fc_usb->udev, 0x81)
+#define B2C2_USB_DATA_PIPE usb_rcvisocpipe(fc_usb->udev, 1)
 
 struct flexcop_usb {
 	struct usb_device *udev;