USB: Add a new quirk: USB_QUIRK_HONOR_BNUMINTERFACES
authorHans de Goede <hdegoede@redhat.com>
Mon, 29 Mar 2010 10:03:17 +0000 (12:03 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 20 May 2010 20:21:32 +0000 (13:21 -0700)
commit317149c655defedfaf432143b86a720cfc12a424
treec9834f9813e14b595c93da5d7ceb718af39d1c5d
parent7f0ae3a8eeb7f231dc99cee7c871ba64e07ebefe
USB: Add a new quirk: USB_QUIRK_HONOR_BNUMINTERFACES

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>
drivers/usb/core/config.c
drivers/usb/core/quirks.c
include/linux/usb/quirks.h