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 fe2a471e5f64..72cab9bcdf95 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);