[PATCH] drm/i915: fix wrong error number report

From: Andi Shyti <andi.shyti@intel.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: [PATCH] drm/i915: fix wrong error number report
Date: Mon,  1 Oct 2018 19:54:18 +0300	[thread overview]
Message-ID: <20181001165418.2168-1-andi.shyti@intel.com> (raw)

During driver load it's considered that the i915_driver_create()
function fails only in case of insufficient memory. Indeed, in
case of failure of i915_driver_create(), the load function
returns indiscriminately -ENOMEM ignoring the real cause of
failure.

In i915_driver_create() get the consistent error value from
drm_dev_init() and embed it in the pointer return value.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 1b028f429e92..d1f65d57f4df 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1627,14 +1627,16 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
 		(struct intel_device_info *)ent->driver_data;
 	struct intel_device_info *device_info;
 	struct drm_i915_private *i915;
+	int err;
 
 	i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
 	if (!i915)
 		return NULL;
 
-	if (drm_dev_init(&i915->drm, &driver, &pdev->dev)) {
+	err = drm_dev_init(&i915->drm, &driver, &pdev->dev);
+	if (err) {
 		kfree(i915);
-		return NULL;
+		return ERR_PTR(err);
 	}
 
 	i915->drm.pdev = pdev;
@@ -1683,8 +1685,8 @@ int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
 	int ret;
 
 	dev_priv = i915_driver_create(pdev, ent);
-	if (!dev_priv)
-		return -ENOMEM;
+	if (IS_ERR(dev_priv))
+		return PTR_ERR(dev_priv);
 
 	/* Disable nuclear pageflip by default on pre-ILK */
 	if (!i915_modparams.nuclear_pageflip && match_info->gen < 5)
-- 
2.19.0

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