Revert "drm/exynos: fix null pointer dereference issue"

This reverts commit cea24824ab432f8acabb254d6805e9aa756de6af.

Moving subdriver probe to exynos_drm_platform_probe() was making
exynos_drm_device_subdrv_probe() fail because the platform data wasn't set
yet. It only gets set in exynos_drm_load.

We need to find a smarter way to fix this issue.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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 eab12f0..2ca0c5d 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -108,6 +108,11 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
        if (ret)
                goto err_unbind_all;
 
+       /* Probe non kms sub drivers and virtual display driver. */
+       ret = exynos_drm_device_subdrv_probe(dev);
+       if (ret)
+               goto err_cleanup_vblank;
+
        /*
         * enable drm irq mode.
         * - with irq_enabled = true, we can use the vblank feature.
@@ -133,6 +138,8 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
 
        return 0;
 
+err_cleanup_vblank:
+       drm_vblank_cleanup(dev);
 err_unbind_all:
        component_unbind_all(dev->dev, dev);
 err_mode_config_cleanup:
@@ -146,6 +153,8 @@ err_free_private:
 
 static int exynos_drm_unload(struct drm_device *dev)
 {
+       exynos_drm_device_subdrv_remove(dev);
+
        exynos_drm_fbdev_fini(dev);
        drm_kms_helper_poll_fini(dev);
 
@@ -614,14 +623,8 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
        if (ret < 0)
                goto err_unregister_non_kms_drivers;
 
-       /* Probe non kms sub drivers and virtual display driver. */
-       ret = exynos_drm_device_subdrv_probe(platform_get_drvdata(pdev));
-       if (ret)
-               goto err_unregister_resources;
-
        return ret;
 
-err_unregister_resources:
 #ifdef CONFIG_DRM_EXYNOS_IPP
        exynos_platform_device_ipp_unregister();
 #endif
@@ -643,8 +646,6 @@ static int exynos_drm_platform_remove(struct platform_device *pdev)
 {
        int i;
 
-       exynos_drm_device_subdrv_remove(platform_get_drvdata(pdev));
-
 #ifdef CONFIG_DRM_EXYNOS_IPP
        exynos_platform_device_ipp_unregister();
 #endif