gs_start_io() and gs_close()

[Igor Grinberg]

 On 08/26/10 04:21, Jim Sung wrote:
> I'm debugging a problem with the USB gadget serial on the Marvell PXA168

CC'ed LAKML

> platform, which led to the following observations:
>
> - The way gs_start_io() is implemented, each time it is invoked,
>   port->read_pool and port->write_pool will grow by QUEUE_SIZE, which
>   seems wrong.
>
>   For now, I just added a list_empty() check in gs_start_io() on the two
>   lists.
>
> - "struct gs_port" does not appear to have provision to notify the USB
>   device controller to release any resource (particularly for rx) in
>   gs_close().
>
>   To fix the problem, I have a hard coded call into the USB device
>   controller right now, but that is ugly.
>
> The particular kernel I'm working with is 2.6.28, but I took a look at
> 2.6.35-rc6, and I don't see any change in these areas.
>
> Jim
>
>
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-- 
Regards,
Igor.