From 31962ca6a26087eea255c000ea9fa4ffbdad697b Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 5 Sep 2018 15:09:21 +0100
Subject: [PATCH] drm/i915: Move final cleanup of drm_i915_private to i915_driver_destroy
Git-commit: 31962ca6a26087eea255c000ea9fa4ffbdad697b
Patch-mainline: v4.20-rc1
References: jsc#SLE-4986

Introduce a complementary function to i915_driver_create() to undo all
that is created.

Suggested-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180905140921.17467-2-chris@chris-wilson.co.uk
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_drv.c |   19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1353,6 +1353,17 @@ i915_driver_create(struct pci_dev *pdev,
 	return i915;
 }
 
+static void i915_driver_destroy(struct drm_i915_private *i915)
+{
+	struct pci_dev *pdev = i915->drm.pdev;
+
+	drm_dev_fini(&i915->drm);
+	kfree(i915);
+
+	/* And make sure we never chase our dangling pointer from pci_dev */
+	pci_set_drvdata(pdev, NULL);
+}
+
 /**
  * i915_driver_load - setup chip and create an initial config
  * @pdev: PCI device
@@ -1446,9 +1457,7 @@ out_pci_disable:
 	pci_disable_device(pdev);
 out_fini:
 	i915_load_error(dev_priv, "Device initialization failed (%d)\n", ret);
-	drm_dev_fini(&dev_priv->drm);
-	kfree(dev_priv);
-	pci_set_drvdata(pdev, NULL);
+	i915_driver_destroy(dev_priv);
 	return ret;
 }
 
@@ -1497,9 +1506,7 @@ static void i915_driver_release(struct d
 	struct drm_i915_private *dev_priv = to_i915(dev);
 
 	i915_driver_cleanup_early(dev_priv);
-	drm_dev_fini(&dev_priv->drm);
-
-	kfree(dev_priv);
+	i915_driver_destroy(dev_priv);
 }
 
 static int i915_driver_open(struct drm_device *dev, struct drm_file *file)