diff options
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-cards.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index fe2a471e5f6..72cab9bcdf9 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c @@ -2365,6 +2365,20 @@ static int em28xx_usb_probe(struct usb_interface *interface, ifnum, interface->altsetting->desc.bInterfaceNumber); + /* + * Make sure we have 480 Mbps of bandwidth, otherwise things like + * video stream wouldn't likely work, since 12 Mbps is generally + * not enough even for most Digital TV streams. + */ + if (udev->speed != USB_SPEED_HIGH) { + printk(DRIVER_NAME ": Device initialization failed.\n"); + printk(DRIVER_NAME ": Device must be connected to a high-speed" + " USB 2.0 port.\n"); + em28xx_devused &= ~(1<<nr); + retval = -ENODEV; + goto err; + } + if (nr >= EM28XX_MAXBOARDS) { printk(DRIVER_NAME ": Supports only %i em28xx boards.\n", EM28XX_MAXBOARDS); |