lkml.org 
[lkml]   [2016]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 4.2.y-ckt 009/211] xhci: don't finish a TD if we get a short transfer event mid TD
From
Date
On Wed, 2016-01-06 at 11:55 -0800, Kamal Mostafa wrote:
> On Wed, 2016-01-06 at 17:05 +0000, Ben Hutchings wrote:
> > On Tue, 2016-01-05 at 11:41 -0800, Kamal Mostafa wrote:
> > > 4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.
> > >
> > > ------------------
> > >
> > > From: Mathias Nyman <mathias.nyman@linux.intel.com>
> > >
> > > commit e210c422b6fdd2dc123bedc588f399aefd8bf9de upstream.
> > >
> > > If the difference is big enough between the bytes asked and received
> > > in a bulk transfer we can get a short transfer event pointing to a TRB in
> > > the middle of the TD. We don't want to handle the TD yet as we will anyway
> > > receive a new event for the last TRB in the TD.
> > >
> > > Hold off from finishing the TD and removing it from the list until we
> > > receive an event for the last TRB in the TD
> > >
> > > Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > [ kamal: backport to 4.2-stable: context ]
> > > Signed-off-by: Kamal Mostafa <kamal@canonical.com>
> > [...]
> >
> > This causes regressions (see https://bugs.debian.org/808602 and
> > https://bugs.debian.org/808953 ) so please hold off until there's a
> > complete fix upstream.
>
> Thanks for the heads-up, Ben.  I'll defer it for 4.2-stable.
>
> I'm thinking that it should also be reverted from the stable kernels
> that already carry it (3.2, 3.13, 3.16, 3.19), unless that complete
> upstream fix is really imminent.  Is it?

Normally if there's a regression that affects both mainline and stable
branches, we wait for it to be fixed in mainline first.

Ben.

--
Ben Hutchings
Life would be so much easier if we could look at the source code.[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2016-01-07 04:21    [W:0.261 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site