diff options
| -rw-r--r-- | drivers/usb/storage/uas.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 3f021f2fafdf..54db36541b93 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -892,10 +892,10 @@ static int uas_isnt_supported(struct usb_device *udev) return -ENODEV; } -static int uas_switch_interface(struct usb_device *udev, - struct usb_interface *intf) +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++) { @@ -904,15 +904,26 @@ static int uas_switch_interface(struct usb_device *udev, if (uas_is_interface(alt)) { if (!sg_supported) return uas_isnt_supported(udev); - return usb_set_interface(udev, - alt->desc.bInterfaceNumber, - alt->desc.bAlternateSetting); + return alt->desc.bAlternateSetting; } } return -ENODEV; } +static int uas_switch_interface(struct usb_device *udev, + struct usb_interface *intf) +{ + int alt; + + alt = uas_find_uas_alt_setting(intf); + if (alt < 0) + return alt; + + return usb_set_interface(udev, + intf->altsetting[0].desc.bInterfaceNumber, alt); +} + static void uas_configure_endpoints(struct uas_dev_info *devinfo) { struct usb_host_endpoint *eps[4] = { }; |