From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 5 May 2014 08:07:32 +0000 (+0100)
Subject: drm/i915: Improve fallback ring waiting
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~44^2~38^2~163
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcfe050659bbd02e3b18d4b19eb0bcc8d0072bb0;p=pandora-kernel.git

drm/i915: Improve fallback ring waiting

A few improvements to the fallback method for waiting upon ring space:

1. Fix the start/end wait tracepoints to always be paired.
2. Increase responsiveness of checking
3. Mark the process as waiting upon io
4. Check for signal interruptions

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
[danvet: Drop the s/msleep/io_schedule_timeout/ change again since the
latter isn't exported.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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