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
Date: Fri, 12 Oct 2012 06:53:10 +0900 [thread overview]
Message-ID: <20121011215310.GA24651@kroah.com> (raw)
In-Reply-To: <20121011213707.GA2187@polaris.bitmath.org>
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
next prev parent reply other threads:[~2012-10-11 21:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-10 20:31 REGRESSION: usbdevfs: Use-scatter-gather-lists-for-large-bulk-transfers Henrik Rydberg
2012-10-10 20:34 ` Peter Stuge
2012-10-11 5:44 ` Henrik Rydberg
2012-10-11 6:50 ` Peter Stuge
2012-10-11 6:57 ` Xiaofan Chen
2012-10-11 7:12 ` Peter Stuge
2012-10-11 21:54 ` Henrik Rydberg
2012-10-11 8:21 ` Hans de Goede
2012-10-11 21:37 ` Henrik Rydberg
2012-10-11 21:40 ` Peter Stuge
2012-10-11 21:53 ` Greg Kroah-Hartman [this message]
2012-10-12 14:11 ` Hans de Goede
2012-10-12 15:10 ` Henrik Rydberg
2012-10-12 14:25 ` Alan Stern
2012-10-12 15:08 ` Henrik Rydberg
2012-10-12 15:10 ` Alan Stern
2012-10-14 15:40 ` Hans de Goede
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