forked from Minki/linux
drm/sun4i: Check return value of drm_vblank_init
drm_vblank_init can fail due to insufficient memory. Ignoring the error and proceeding may cause the kernel to dereference an invalid pointer when vblank is enabled. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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@ -102,7 +102,11 @@ static int sun4i_drv_bind(struct device *dev)
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}
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drm->dev_private = drv;
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drm_vblank_init(drm, 1);
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/* drm_vblank_init calls kcalloc, which can fail */
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ret = drm_vblank_init(drm, 1);
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if (ret)
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goto free_drm;
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drm_mode_config_init(drm);
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ret = component_bind_all(drm->dev, drm);
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