From 15c86bdb760185e871c7a0f559978328aa500971 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 17 May 2016 15:08:03 +0200 Subject: [PATCH] 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 Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-21-git-send-email-maarten.lankhorst@linux.intel.com Reviewed-by: Patrik Jakobsson --- drivers/gpu/drm/i915/intel_display.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7bb1015c33d4..40018388660c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -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); -- 2.34.1