@@ -643,6 +643,7 @@ static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
: USB_ENDPOINT_XFER_ISOC;
i = gspca_dev->alt; /* previous alt setting */
+find_alt:
if (gspca_dev->cam.reverse_alts) {
while (++i < gspca_dev->nbalt) {
ep = alt_xfer(&intf->altsetting[i], xfer);
@@ -666,10 +667,11 @@ static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
if (gspca_dev->nbalt > 1) {
gspca_input_destroy_urb(gspca_dev);
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
- if (ret < 0) {
- err("set alt %d err %d", i, ret);
- ep = NULL;
- }
+ /* xHCI hosts will reject set interface requests
+ * if they take too much bandwidth, so try again.
+ */
+ if (ret < 0)
+ goto find_alt;
gspca_input_create_urb(gspca_dev);
}
return ep;