From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Mon, 9 Oct 2017 08:44:01 +0000 (+0200)
Subject: drm/exynos: Clear drvdata after component unbind
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=238604ca0b708319e089e22545bcda39afb5faa8;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 aa770bb0153c..82b72425a42f 100644
--- 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);
 }