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drm/i915: Check for unpin correctness. 

If planes are added to the state after the call to
drm_atomic_helper_check_planes planes_changed may not be set
and we will not unpin the old framebuffer. This results in a
pin leak long after the framebuffer is destroyed, so to find
this add some checks when it happens.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-21-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
This commit is contained in:
Maarten Lankhorst 2016-05-17 15:08:03 +02:00
parent 95c2ccdc82
commit 15c86bdb76
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/intel_display.c
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@ -13371,11 +13371,20 @@ intel_prepare_plane_fb(struct drm_plane *plane,
struct intel_plane *intel_plane = to_intel_plane(plane);
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->state->fb);
struct drm_crtc *crtc = new_state->crtc ?: plane->state->crtc;
int ret = 0;
if (!obj && !old_obj)
return 0;
if (WARN_ON(!new_state->state) || WARN_ON(!crtc) ||
WARN_ON(!to_intel_atomic_state(new_state->state)->work[to_intel_crtc(crtc)->pipe])) {
if (WARN_ON(old_obj != obj))
return -EINVAL;
return 0;
}
if (old_obj) {
struct drm_crtc_state *crtc_state =
drm_atomic_get_existing_crtc_state(new_state->state, plane->state->crtc);