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drm/i915: Add locking around framebuffer_references--
obj->framebuffer_references isn't an atomic_t so the decrement needs to be protected by some lock. struct_mutex seems like the appropriate lock here, and we may already take it for the obj unref anyway. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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1 changed files with 4 additions and 1 deletions
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@ -11594,11 +11594,14 @@ static void intel_setup_outputs(struct drm_device *dev)
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static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
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{
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struct drm_device *dev = fb->dev;
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struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
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drm_framebuffer_cleanup(fb);
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mutex_lock(&dev->struct_mutex);
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WARN_ON(!intel_fb->obj->framebuffer_references--);
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drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
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drm_gem_object_unreference(&intel_fb->obj->base);
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mutex_unlock(&dev->struct_mutex);
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kfree(intel_fb);
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}
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