diff options
Diffstat (limited to 'drivers/usb/core/generic.c')
| -rw-r--r-- | drivers/usb/core/generic.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c index ebb20ff7ac5..b531a4fd30c 100644 --- a/drivers/usb/core/generic.c +++ b/drivers/usb/core/generic.c @@ -25,6 +25,20 @@ static inline const char *plural(int n) return (n == 1 ? "" : "s"); } +static int is_rndis(struct usb_interface_descriptor *desc) +{ + return desc->bInterfaceClass == USB_CLASS_COMM + && desc->bInterfaceSubClass == 2 + && desc->bInterfaceProtocol == 0xff; +} + +static int is_activesync(struct usb_interface_descriptor *desc) +{ + return desc->bInterfaceClass == USB_CLASS_MISC + && desc->bInterfaceSubClass == 1 + && desc->bInterfaceProtocol == 1; +} + static int choose_configuration(struct usb_device *udev) { int i; @@ -87,14 +101,12 @@ static int choose_configuration(struct usb_device *udev) continue; } - /* If the first config's first interface is COMM/2/0xff - * (MSFT RNDIS), rule it out unless Linux has host-side - * RNDIS support. */ - if (i == 0 && desc - && desc->bInterfaceClass == USB_CLASS_COMM - && desc->bInterfaceSubClass == 2 - && desc->bInterfaceProtocol == 0xff) { -#ifndef CONFIG_USB_NET_RNDIS_HOST + /* When the first config's first interface is one of Microsoft's + * pet nonstandard Ethernet-over-USB protocols, ignore it unless + * this kernel has enabled the necessary host side driver. + */ + if (i == 0 && desc && (is_rndis(desc) || is_activesync(desc))) { +#if !defined(CONFIG_USB_NET_RNDIS_HOST) && !defined(CONFIG_USB_NET_RNDIS_HOST_MODULE) continue; #else best = c; |