[Intel-gfx] [PATCH] drm/i915: fixup interrupted overlay switch off calls

[Daniel Vetter]

When switching to interruptible sleeps in the overlay code, I've
forgotten to recover from interruptions at one site.  This
resulted in the overlay still running when it should have been
switched off. This in turn caused a hang on resume because it
tried to disable the (not-running) overlay in preparation for the
resume modeset.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=24980
Tested-by: maximlevitsky at gmail.com

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
This patch with return statements that actually do something ...

Thanks Andy
---

 drivers/gpu/drm/i915/intel_overlay.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index d18f563..7806f7d 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -880,12 +880,15 @@ int intel_overlay_switch_off(struct intel_overlay *overlay)
 	BUG_ON(!mutex_is_locked(&dev->struct_mutex));
 	BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
 
+	if (overlay->hw_wedged) {
+		ret = intel_overlay_recover_from_interrupt(overlay, 1);
+		if (ret != 0)
+			return ret;
+	}
+
 	if (!overlay->active)
 		return 0;
 
-	if (overlay->hw_wedged)
-		return -EBUSY;
-
 	ret = intel_overlay_release_old_vid(overlay);
 	if (ret != 0)
 		return ret;
-- 
1.6.5.3