Date: Fri, 12 Oct 2012 06:53:10 +0900
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Henrik Rydberg <rydberg@euromail.se>
Cc: Hans de Goede <hdegoede@redhat.com>,
        Alan Stern <stern@rowland.harvard.edu>, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org, Peter Stuge <peter@stuge.se>
Subject: Re: REGRESSION: usbdevfs:
 Use-scatter-gather-lists-for-large-bulk-transfers
Message-ID: <20121011215310.GA24651@kroah.com>
References: <20121010203118.GA792@polaris.bitmath.org>
 <5076819C.9010504@redhat.com>
 <20121011213707.GA2187@polaris.bitmath.org>
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On Thu, Oct 11, 2012 at 11:37:07PM +0200, Henrik Rydberg wrote:
> Hi Hans,
> 
> > Oh what fun (not). The best way to figure out what really is going
> > on is to get some usb level traces. Note my first hunch is that what
> > you're seeing is a device firmware bug, as this patch together with
> > a new libusb (which you seem to also have) will make bulk transfers
> > run slightly faster, which might be just enough to overwhelm your
> > device ...
> 
> Or, the large bulk transfer actually never worked in the first place.
> The list you gave me seemed boringly long, so I read the patch more
> closely instead. The fix below is the result. Greg, will you please
> take it through your tree?

Henrik, Very nice fix, thanks for debugging this.

Hans, any objection to me taking this?

greg k-h
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