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drm/rockchip: fix kernel panic when drm driver probe failed

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For some reason drm driver maybe probe failed, so the drm_dev is
null. this will lead to kernel panic when enter suspend function.

Change-Id: Ic529ba9103d27b0766189285bd6cf8e43b23b912
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
This commit is contained in:
Sandy Huang
2018-03-19 14:52:13 +08:00
parent 5b1eeb6646
commit 2f4dee4910
1 changed files with 9 additions and 2 deletions
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11
drivers/gpu/drm/rockchip/rockchip_drm_drv.c
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@@ -1669,9 +1669,16 @@ static void rockchip_drm_fb_resume(struct drm_device *drm)
static int rockchip_drm_sys_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct rockchip_drm_private *priv = drm->dev_private;
struct drm_device *drm;
struct rockchip_drm_private *priv;
drm = dev_get_drvdata(dev);
if (!drm) {
DRM_ERROR("%s: Failed to get drm device!\n", __func__);
return 0;
}
priv = drm->dev_private;
drm_kms_helper_poll_disable(drm);
rockchip_drm_fb_suspend(drm);