3.8.13.6 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
commit aaf8a5167291b65e9116cb8736d862965b57c13a upstream.
It's not a good idea to also run the pipe_control cleanup.
This regression has been introduced whith the original cs tlb w/a in
commit b45305fce5bb1abec263fcff9d81ebecd6306ede
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Mon Dec 17 16:21:27 2012 +0100
drm/i915: Implement workaround for broken CS tlb on i830/845
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64610
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_ringbuffer.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 42ff97d..27f810f 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -486,9 +486,6 @@ cleanup_pipe_control(struct intel_ring_buffer *ring)
struct pipe_control *pc = ring->private;
struct drm_i915_gem_object *obj;
- if (!ring->private)
- return;
-
obj = pc->obj;
kunmap(sg_page(obj->pages->sgl));
@@ -496,7 +493,6 @@ cleanup_pipe_control(struct intel_ring_buffer *ring)
drm_gem_object_unreference(&obj->base);
kfree(pc);
- ring->private = NULL;
}
static int init_render_ring(struct intel_ring_buffer *ring)
@@ -567,7 +563,10 @@ static void render_ring_cleanup(struct intel_ring_buffer *ring)
if (HAS_BROKEN_CS_TLB(dev))
drm_gem_object_unreference(to_gem_object(ring->private));
- cleanup_pipe_control(ring);
+ if (INTEL_INFO(dev)->gen >= 5)
+ cleanup_pipe_control(ring);
+
+ ring->private = NULL;
}
static void
--
1.8.1.2
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