[alsa-devel] [PATCH] Jabra SPEAK 410 USB - no audio playback

Clemens Ladisch clemens at ladisch.de
Fri Dec 16 14:49:05 CET 2011

Richard W.M. Jones wrote:
> The attached patch fixes USB audio support for the Jabra SPEAK 410 USB.
> The problem, as I understand it, is that the device contains a
> Class-Specific Endpoint (CS_ENDPOINT) descriptor before the Endpoint
> (ENDPOINT) descriptor.  The USB code all assumes that CS_ENDPOINT can
> only appear after ENDPOINT.  Therefore the USB code divides up the
> interface descriptor into "stuff before ENDPOINT" (in
> interface->extra) and "stuff after ENDPOINT" (in
> interface->endpoint[0]->extra).  For this device, this division does
> not work.
> The solution (which is a hack ...) is to also search interface->extra
> looking for the missing descriptor.

The patch looks good.  Please run it through checkpatch.pl and provice
a Signed-off-by tag (see Documentation/SubmittingPatches).


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