drm/i915: Remove the broken flush_ring from page-flip

This is already performed with the pipelined flush, so by the time we
schedule the flush in the page-flip, the ring is NULL and we OOPs
instead.

Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

3 files changed, 2 insertions, 12 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 5fec2ca619e8..ac41ca1157a5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1007,11 +1007,6 @@ int i915_gem_object_put_fence_reg(struct drm_gem_object *obj,
 void i915_gem_retire_requests(struct drm_device *dev);
 void i915_gem_reset_lists(struct drm_device *dev);
 void i915_gem_clflush_object(struct drm_gem_object *obj);
-void i915_gem_flush_ring(struct drm_device *dev,
-                         struct drm_file *file_priv,
-                         struct intel_ring_buffer *ring,
-                         uint32_t invalidate_domains,
-                         uint32_t flush_domains);
 int i915_gem_object_set_domain(struct drm_gem_object *obj,
                                uint32_t read_domains,
                                uint32_t write_domain);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3fd69ad19aa7..174e38abc9ef 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1924,7 +1924,7 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno,
         return i915_do_wait_request(dev, seqno, 1, ring);
 }
 
-void
+static void
 i915_gem_flush_ring(struct drm_device *dev,
                     struct drm_file *file_priv,
                     struct intel_ring_buffer *ring,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b92385498d2c..16541ee9e1e0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5028,7 +5028,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
         struct intel_unpin_work *work;
         unsigned long flags, offset;
         int pipe = intel_crtc->pipe;
-        u32 was_dirty, pf, pipesrc;
+        u32 pf, pipesrc;
         int ret;
 
         work = kzalloc(sizeof *work, GFP_KERNEL);
@@ -5057,7 +5057,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
         obj = intel_fb->obj;
 
         mutex_lock(&dev->struct_mutex);
-        was_dirty = obj->write_domain & I915_GEM_GPU_DOMAINS;
         ret = intel_pin_and_fence_fb_obj(dev, obj, true);
         if (ret)
                 goto cleanup_work;
@@ -5076,10 +5075,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
         atomic_inc(&obj_priv->pending_flip);
         work->pending_flip_obj = obj;
 
-        /* Schedule the pipelined flush */
-        if (was_dirty)
-                i915_gem_flush_ring(dev, NULL, obj_priv->ring, 0, was_dirty);
-
         if (IS_GEN3(dev) || IS_GEN2(dev)) {
                 u32 flip_mask;