[Intel-gfx] [PATCH 3/3] drm/i915: Propagate error from i915_gem_object_flush_gpu_write_domain()

[Chris Wilson]

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.h      |    2 +-
 drivers/gpu/drm/i915/i915_gem.c      |   43 ++++++++++++++++++++++++---------
 drivers/gpu/drm/i915/intel_display.c |    4 ++-
 3 files changed, 35 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 53222eb..46cbff6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -982,7 +982,7 @@ void i915_gem_free_all_phys_object(struct drm_device *dev);
 int i915_gem_object_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
 void i915_gem_object_put_pages(struct drm_gem_object *obj);
 void i915_gem_release(struct drm_device * dev, struct drm_file *file_priv);
-void i915_gem_object_flush_write_domain(struct drm_gem_object *obj);
+int i915_gem_object_flush_write_domain(struct drm_gem_object *obj);
 
 void i915_gem_shrinker_init(void);
 void i915_gem_shrinker_exit(void);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index bd859b2..0cf9584 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -35,7 +35,7 @@
 #include <linux/swap.h>
 #include <linux/pci.h>
 
-static void i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj);
+static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj);
 static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj);
 static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj);
 static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj,
@@ -2582,7 +2582,10 @@ i915_gem_object_put_fence_reg(struct drm_gem_object *obj)
 	if (!IS_I965G(dev)) {
 		int ret;
 
-		i915_gem_object_flush_gpu_write_domain(obj);
+		ret = i915_gem_object_flush_gpu_write_domain(obj);
+		if (ret != 0)
+			return ret;
+
 		ret = i915_gem_object_wait_rendering(obj);
 		if (ret != 0)
 			return ret;
@@ -2732,7 +2735,7 @@ i915_gem_clflush_object(struct drm_gem_object *obj)
 }
 
 /** Flushes any GPU write domain for the object if it's dirty. */
-static void
+static int
 i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj)
 {
 	struct drm_device *dev = obj->dev;
@@ -2740,17 +2743,18 @@ i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj)
 	struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
 
 	if ((obj->write_domain & I915_GEM_GPU_DOMAINS) == 0)
-		return;
+		return 0;
 
 	/* Queue the GPU write cache flushing we need. */
 	old_write_domain = obj->write_domain;
 	i915_gem_flush(dev, 0, obj->write_domain);
-	(void) i915_add_request(dev, NULL, obj->write_domain, obj_priv->ring);
-	BUG_ON(obj->write_domain);
+	if (i915_add_request(dev, NULL, obj->write_domain, obj_priv->ring) == 0)
+		return -ENOMEM;
 
 	trace_i915_gem_object_change_domain(obj,
 					    obj->read_domains,
 					    old_write_domain);
+	return 0;
 }
 
 /** Flushes the GTT write domain for the object if it's dirty. */
@@ -2794,9 +2798,11 @@ i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj)
 					    old_write_domain);
 }
 
-void
+int
 i915_gem_object_flush_write_domain(struct drm_gem_object *obj)
 {
+	int ret = 0;
+
 	switch (obj->write_domain) {
 	case I915_GEM_DOMAIN_GTT:
 		i915_gem_object_flush_gtt_write_domain(obj);
@@ -2805,9 +2811,11 @@ i915_gem_object_flush_write_domain(struct drm_gem_object *obj)
 		i915_gem_object_flush_cpu_write_domain(obj);
 		break;
 	default:
-		i915_gem_object_flush_gpu_write_domain(obj);
+		ret = i915_gem_object_flush_gpu_write_domain(obj);
 		break;
 	}
+
+	return ret;
 }
 
 /**
@@ -2827,7 +2835,10 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write)
 	if (obj_priv->gtt_space == NULL)
 		return -EINVAL;
 
-	i915_gem_object_flush_gpu_write_domain(obj);
+	ret = i915_gem_object_flush_gpu_write_domain(obj);
+	if (ret != 0)
+		return ret;
+
 	/* Wait on any GPU rendering and flushing to occur. */
 	ret = i915_gem_object_wait_rendering(obj);
 	if (ret != 0)
@@ -2877,7 +2888,9 @@ i915_gem_object_set_to_display_plane(struct drm_gem_object *obj)
 	if (obj_priv->gtt_space == NULL)
 		return -EINVAL;
 
-	i915_gem_object_flush_gpu_write_domain(obj);
+	ret = i915_gem_object_flush_gpu_write_domain(obj);
+	if (ret)
+		return ret;
 
 	/* Wait on any GPU rendering and flushing to occur. */
 	if (obj_priv->active) {
@@ -2925,7 +2938,10 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write)
 	uint32_t old_write_domain, old_read_domains;
 	int ret;
 
-	i915_gem_object_flush_gpu_write_domain(obj);
+	ret = i915_gem_object_flush_gpu_write_domain(obj);
+	if (ret)
+		return ret;
+
 	/* Wait on any GPU rendering and flushing to occur. */
 	ret = i915_gem_object_wait_rendering(obj);
 	if (ret != 0)
@@ -3215,7 +3231,10 @@ i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj,
 	if (offset == 0 && size == obj->size)
 		return i915_gem_object_set_to_cpu_domain(obj, 0);
 
-	i915_gem_object_flush_gpu_write_domain(obj);
+	ret = i915_gem_object_flush_gpu_write_domain(obj);
+	if (ret)
+		return ret;
+
 	/* Wait on any GPU rendering and flushing to occur. */
 	ret = i915_gem_object_wait_rendering(obj);
 	if (ret != 0)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9a257c9..61c8d8d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4704,7 +4704,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	drm_gem_object_reference(obj);
 
 	crtc->fb = fb;
-	i915_gem_object_flush_write_domain(obj);
+	ret = i915_gem_object_flush_write_domain(obj);
+	if (ret)
+		goto cleanup_objs;
 
 	ret = drm_vblank_get(dev, intel_crtc->pipe);
 	if (ret)
-- 
1.7.1