From: Imre Deak Date: Tue, 11 Feb 2014 22:01:10 +0000 (+0200) Subject: drm/i915: unbind fbs from crtcs during driver unload X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9d6612516da0b7592dac221d1c836d7a906bb3c5;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: unbind fbs from crtcs during driver unload So far during driver unload we called drm_framebuffer_cleanup() for the fbdev fb, which only removes the fb from the drm fb list regardless of its reference count, but leaves the fb bound on an active crtc. Since the fb's backing storage was freed this could mean we scan some random memory content out afterwards. It's not a big issue since the fb is allocated from stolen memory and afaik there is no other user for that than i915. It's still cleaner to properly unbind the fb and disable the crtc, which is what drm_framebuffer_remove() does. Note that after commit 88891eb1e9eca0ba619518bed31580f91e9cf84d Author: Daniel Vetter Date: Mon Feb 10 18:00:38 2014 +0100 we call drm_framebuffer_cleanup() only after dropping the last reference on the fb, but that won't happen since we don't unbind the fb. This results in a drm core warn about a leaked fb. Signed-off-by: Imre Deak Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index cf4627387c5a..3a53ee307065 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -265,7 +265,7 @@ static void intel_fbdev_destroy(struct drm_device *dev, drm_fb_helper_fini(&ifbdev->helper); drm_framebuffer_unregister_private(&ifbdev->fb->base); - drm_framebuffer_unreference(&ifbdev->fb->base); + drm_framebuffer_remove(&ifbdev->fb->base); } int intel_fbdev_init(struct drm_device *dev)