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drm/i915: Check whether chip is wedged in i915_wait_request()

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i915_wait_request() only checks mm.wedged after it interacts with the
hardware, generally causing the driver to lock up waiting for a wedged
chip. Make sure we check mm.wedged as the first thing we do.

Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Gamari <bgamari.foss@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Ben Gamari 2009-09-14 17:48:41 -04:00 committed by Jesse Barnes
parent 078a033f45
commit ffed1d0920
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_gem.c
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@ -1751,6 +1751,9 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno)
BUG_ON(seqno == 0);
if (dev_priv->mm.wedged)
return -EIO;
if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) {
if (IS_IGDNG(dev))
ier = I915_READ(DEIER) | I915_READ(GTIER);