[Intel-gfx] [PATCH] drm/i915: Make WAIT_IOCTL negative timeouts be indefinite again

[Chris Wilson]

On Fri, Mar 06, 2015 at 05:48:26PM +0100, Daniel Vetter wrote:
> On Fri, Mar 06, 2015 at 08:54:35AM +0000, Chris Wilson wrote:
> > On Thu, Mar 05, 2015 at 01:27:43PM +0100, Daniel Vetter wrote:
> > > On Wed, Mar 04, 2015 at 06:09:26PM +0000, Chris Wilson wrote:
> > > > This fixes a regression from
> > > > 
> > > > commit 5ed0bdf21a85d78e04f89f15ccf227562177cbd9
> > > > Author: Thomas Gleixner <tglx at linutronix.de>
> > > > Date:   Wed Jul 16 21:05:06 2014 +0000
> > > > 
> > > >     drm: i915: Use nsec based interfaces
> > > > 
> > > > that made a negative timeout return immediately rather than the
> > > > previously defined behaviour of waiting indefinitely.
> > > > 
> > > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > > > Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> > > > Cc: Ben Widawsky <benjamin.widawsky at intel.com>
> > > > Cc: Kristian Høgsberg <krh at bitplanet.net>
> > > > Cc: stable at vger.kernel.org
> > > 
> > > Do you have the igt for this too? I think an wait while the buffer should
> > > be busy with a negative timeout is all that's needed to exercise this.
> > 
> > Done.
> > Testcase: igt/gem_wait
> 
> Thanks a lot.
> 
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89494
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre