From: grinberg@compulab.co.il (Igor Grinberg)
To: linux-arm-kernel@lists.infradead.org
Subject: gs_start_io() and gs_close()
Date: Thu, 26 Aug 2010 10:05:39 +0300 [thread overview]
Message-ID: <4C761243.6000606@compulab.co.il> (raw)
In-Reply-To: <loom.20100826T032027-25@post.gmane.org>
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.
next parent reply other threads:[~2010-08-26 7:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <loom.20100826T032027-25@post.gmane.org>
2010-08-26 7:05 ` Igor Grinberg [this message]
2010-08-26 18:30 ` gs_start_io() and gs_close() David Brownell
2010-08-31 1:30 ` Jim Sung
2010-08-31 3:42 ` David Brownell
2010-08-31 4:08 ` Greg KH
2010-08-31 3:45 ` David Brownell
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