From: Nico Huber <nico.h@gmx.de>

The receiver of my Logitech Cordeless Desktop fails to report the
keyboard's class descriptor most times I insert the usb-hid module since I
changed to linux 2.6.  The modell of the receiver is C-BD9-DUAL REV C.  The
request seems not to fail but the count of received characters is zero.

As I said it only fails most times, I worked around making the following
changes in drivers/usb/input/hid-core.c from linux-2.6.11-rc2:

Following the good example of drivers/usb/core/message.c line 575, I
initialized the buffer in hid_get_class_descriptor() to zero.  In the loop
of hid_get_class_descriptor() not waiting for any result but waiting for a
result wich is lower the requested size of the class descriptor (line
1290).  usb_hid_configure() should not try to parse the expected length but
the received (line 1653).

Attached is a patch with these changes
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>