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drm/vc4: Fix a framebuffer reference leak on async flip interrupt.

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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 <eric@anholt.net>
(cherry picked from commit 48627eb8dc)
This commit is contained in:
Eric Anholt
2016-02-05 15:06:15 -08:00
parent 4e33b620d7
commit daead4be0f
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -527,6 +527,7 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
/* Make sure all other async modesetes have landed. */ /* Make sure all other async modesetes have landed. */
ret = down_interruptible(&vc4->async_modeset); ret = down_interruptible(&vc4->async_modeset);
if (ret) { if (ret) {
drm_framebuffer_unreference(fb);
kfree(flip_state); kfree(flip_state);
return ret; return ret;
} }