[PATCH] drm/vgem: validate vgem_device before exit operations

[Melissa Wen]

This patch adds a check for the vgem_device before handling it.

Signed-off-by: Melissa Wen <melissa.srw at gmail.com>
---
 drivers/gpu/drm/vgem/vgem_drv.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index cb884c890065..119ca887cb8a 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -472,7 +472,14 @@ static int __init vgem_init(void)
 
 static void __exit vgem_exit(void)
 {
-	struct platform_device *pdev = vgem_device->platform;
+	struct platform_device *pdev;
+
+	if (!vgem_device) {
+		DRM_INFO("vgem_device is NULL\n");
+		return;
+	}
+
+	pdev = vgem_device->platform;
 
 	drm_dev_unregister(&vgem_device->drm);
 	devres_release_group(&pdev->dev, NULL);
-- 
2.28.0