[PATCH 1/6] drm/vc4: Fix a framebuffer reference leak on async flip interrupt.

[Eric Anholt]

We'd need X to queue up an async pageflip while another is
outstanding, and then take a SIGIO.  I think X actually avoids sending
out the next pageflip while one's already queued, but I'm not sure.

Signed-off-by: Eric Anholt <e...@anholt.net>
---
 drivers/gpu/drm/vc4/vc4_crtc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 68227cc..bb74cb9 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -527,6 +527,7 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
        /* Make sure all other async modesetes have landed. */
        ret = down_interruptible(&vc4->async_modeset);
        if (ret) {
+               drm_framebuffer_unreference(fb);
                kfree(flip_state);
                return ret;
        }
-- 
2.7.0