drm/exynos: Clear drvdata after component unbind

When components are unbound, DRM driver is unregistered and freed,
so clear drvdata to avoid potential use-after-free issue in
suspend/resume paths.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index aa770bb0153c7fdceacf9536bad5905e52145a89..82b72425a42f7977c993134a2142434d8689227f 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -430,6 +430,7 @@ static void exynos_drm_unbind(struct device *dev)
 
        kfree(drm->dev_private);
        drm->dev_private = NULL;
+       dev_set_drvdata(dev, NULL);
 
        drm_dev_unref(drm);
 }