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drm/i915: correct suspend/resume ordering 

We need to save register state *after* idling GEM, clearing the ring,
and uninstalling the IRQ handler, or we might end up saving bogus
fence regs, for one.  Our restore ordering should already be correct,
since we do GEM, ring and IRQ init after restoring the last register
state, which prevents us from clobbering things.

I put this together to potentially address a bug, but I haven't heard
back if it fixes it yet.  However I think it stands on its own, so I'm
sending it in.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes 2009-06-22 18:05:12 -07:00 committed by Eric Anholt
parent be9f1c4f73
commit 9e06dd39f2
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/i915_drv.c
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@ -67,8 +67,6 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state)
pci_save_state(dev->pdev);
i915_save_state(dev);
/* If KMS is active, we do the leavevt stuff here */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
if (i915_gem_idle(dev))
@ -77,6 +75,8 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state)
drm_irq_uninstall(dev);
}
i915_save_state(dev);
intel_opregion_free(dev, 1);
if (state.event == PM_EVENT_SUSPEND) {