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

[Chris Wilson]

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
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre