lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

USB: Add a new quirk: USB_QUIRK_HONOR_BNUMINTERFACES

Browse Source 
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>
This commit is contained in:
Hans de Goede
2010-03-29 12:03:17 +02:00
committed by Greg Kroah-Hartman
parent 7f0ae3a8ee
commit 317149c655
3 changed files with 22 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/usb/quirks.h
View File

@@ -22,4 +22,8 @@
/*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 */