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From f00febe1475d06993b3f723ece375388dcf3bb9b Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 22 Dec 2011 14:54:59 -0800
Subject: [PATCH 14/46] drm/i915: Do the fallback non-IRQ wait in ring
throttle, too.
commit 7ea29b13e5e3e1e61e612349eb0366efdb6457f3 upstream.
As a workaround for IRQ synchronization issues in the gen7 BLT ring,
we want to turn the two wait functions into polling loops.
Signed-off-by: Eric Anholt <eric@anholt.net>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/gpu/drm/i915/i915_gem.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3e7c478..3e2edc6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3312,6 +3312,10 @@ i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
if (ret == 0 && atomic_read(&dev_priv->mm.wedged))
ret = -EIO;
+ } else if (wait_for(i915_seqno_passed(ring->get_seqno(ring),
+ seqno) ||
+ atomic_read(&dev_priv->mm.wedged), 3000)) {
+ ret = -EBUSY;
}
}
--
1.7.10
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