drm/i915: Unpin the flip target if we fail to queue the flip

commit 83d4092b0381e5dd6f312b2ec57121dcf0fcbade upstream.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2:
 - adjust context
 - we don't have intel_unpin_fb_obj(); use i915_gem_object_unpin()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4720397..1f43ae5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7009,14 +7009,14 @@ static int intel_gen2_queue_flip(struct drm_device *dev,
 
        ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
        if (ret)
-               goto out;
+               goto err;
 
        /* Offset into the new buffer for cases of shared fbs between CRTCs */
        offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;
 
        ret = BEGIN_LP_RING(6);
        if (ret)
-               goto out;
+               goto err_unpin;
 
        /* Can't queue multiple flips, so wait for the previous
         * one to finish before executing the next.
@@ -7033,7 +7033,11 @@ static int intel_gen2_queue_flip(struct drm_device *dev,
        OUT_RING(obj->gtt_offset + offset);
        OUT_RING(MI_NOOP);
        ADVANCE_LP_RING();
-out:
+       return 0;
+
+err_unpin:
+       i915_gem_object_unpin(obj);
+err:
        return ret;
 }
 
@@ -7050,14 +7054,14 @@ static int intel_gen3_queue_flip(struct drm_device *dev,
 
        ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
        if (ret)
-               goto out;
+               goto err;
 
        /* Offset into the new buffer for cases of shared fbs between CRTCs */
        offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;
 
        ret = BEGIN_LP_RING(6);
        if (ret)
-               goto out;
+               goto err_unpin;
 
        if (intel_crtc->plane)
                flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
@@ -7072,7 +7076,11 @@ static int intel_gen3_queue_flip(struct drm_device *dev,
        OUT_RING(MI_NOOP);
 
        ADVANCE_LP_RING();
-out:
+       return 0;
+
+err_unpin:
+       i915_gem_object_unpin(obj);
+err:
        return ret;
 }
 
@@ -7088,11 +7096,11 @@ static int intel_gen4_queue_flip(struct drm_device *dev,
 
        ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
        if (ret)
-               goto out;
+               goto err;
 
        ret = BEGIN_LP_RING(4);
        if (ret)
-               goto out;
+               goto err_unpin;
 
        /* i965+ uses the linear or tiled offsets from the
         * Display Registers (which do not change across a page-flip)
@@ -7111,7 +7119,11 @@ static int intel_gen4_queue_flip(struct drm_device *dev,
        pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
        OUT_RING(pf | pipesrc);
        ADVANCE_LP_RING();
-out:
+       return 0;
+
+err_unpin:
+       i915_gem_object_unpin(obj);
+err:
        return ret;
 }
 
@@ -7127,11 +7139,11 @@ static int intel_gen6_queue_flip(struct drm_device *dev,
 
        ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
        if (ret)
-               goto out;
+               goto err;
 
        ret = BEGIN_LP_RING(4);
        if (ret)
-               goto out;
+               goto err_unpin;
 
        OUT_RING(MI_DISPLAY_FLIP |
                 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
@@ -7142,7 +7154,11 @@ static int intel_gen6_queue_flip(struct drm_device *dev,
        pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
        OUT_RING(pf | pipesrc);
        ADVANCE_LP_RING();
-out:
+       return 0;
+
+err_unpin:
+       i915_gem_object_unpin(obj);
+err:
        return ret;
 }
 
@@ -7164,18 +7180,22 @@ static int intel_gen7_queue_flip(struct drm_device *dev,
 
        ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
        if (ret)
-               goto out;
+               goto err;
 
        ret = intel_ring_begin(ring, 4);
        if (ret)
-               goto out;
+               goto err_unpin;
 
        intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | (intel_crtc->plane << 19));
        intel_ring_emit(ring, (fb->pitch | obj->tiling_mode));
        intel_ring_emit(ring, (obj->gtt_offset));
        intel_ring_emit(ring, (MI_NOOP));
        intel_ring_advance(ring);
-out:
+       return 0;
+
+err_unpin:
+       i915_gem_object_unpin(obj);
+err:
        return ret;
 }