mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 16:38:31 +00:00
317149c655
Add a new quirk USB_QUIRK_HONOR_BNUMINTERFACES, when this quirk is set and a device has more interface descriptors in a configuration then it claims to have in config->bNumInterfaces, ignore all additional interfaces. This is needed for devices which try to hide unused interfaces by only lowering config->bNumInterfaces, and which can't handle if you try to talk to the "hidden" interfaces. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
30 lines
956 B
C
30 lines
956 B
C
/*
|
|
* This file holds the definitions of quirks found in USB devices.
|
|
* Only quirks that affect the whole device, not an interface,
|
|
* belong here.
|
|
*/
|
|
|
|
#ifndef __LINUX_USB_QUIRKS_H
|
|
#define __LINUX_USB_QUIRKS_H
|
|
|
|
/* string descriptors must not be fetched using a 255-byte read */
|
|
#define USB_QUIRK_STRING_FETCH_255 0x00000001
|
|
|
|
/* device can't resume correctly so reset it instead */
|
|
#define USB_QUIRK_RESET_RESUME 0x00000002
|
|
|
|
/* device can't handle Set-Interface requests */
|
|
#define USB_QUIRK_NO_SET_INTF 0x00000004
|
|
|
|
/* device can't handle its Configuration or Interface strings */
|
|
#define USB_QUIRK_CONFIG_INTF_STRINGS 0x00000008
|
|
|
|
/*device will morph if reset, don't use reset for handling errors */
|
|
#define USB_QUIRK_RESET_MORPHS 0x00000010
|
|
|
|
/* device has more interface descriptions than the bNumInterfaces count,
|
|
and can't handle talking to these interfaces */
|
|
#define USB_QUIRK_HONOR_BNUMINTERFACES 0x00000020
|
|
|
|
#endif /* __LINUX_USB_QUIRKS_H */
|