intf->desc.bInterfaceProtocol == USB_PR_UAS);
}
-static int uas_isnt_supported(struct usb_device *udev)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- dev_warn(&udev->dev, "The driver for the USB controller %s does not "
- "support scatter-gather which is\n",
- hcd->driver->description);
- dev_warn(&udev->dev, "required by the UAS driver. Please try an"
- "alternative USB controller if you wish to use UAS.\n");
- return -ENODEV;
-}
-
static int uas_find_uas_alt_setting(struct usb_interface *intf)
{
int i;
- struct usb_device *udev = interface_to_usbdev(intf);
- int sg_supported = udev->bus->sg_tablesize != 0;
for (i = 0; i < intf->num_altsetting; i++) {
struct usb_host_interface *alt = &intf->altsetting[i];
- if (uas_is_interface(alt)) {
- if (!sg_supported)
- return uas_isnt_supported(udev);
+ if (uas_is_interface(alt))
return alt->desc.bAlternateSetting;
- }
}
return -ENODEV;
if (r < 0)
return 0;
+ if (udev->bus->sg_tablesize == 0) {
+ dev_warn(&udev->dev,
+ "The driver for the USB controller %s does not support scatter-gather which is\n",
+ hcd->driver->description);
+ dev_warn(&udev->dev,
+ "required by the UAS driver. Please try an other USB controller if you wish to use UAS.\n");
+ return 0;
+ }
+
return 1;
}