[PATCH v4 02/20] iommu/tegra: gart: Clean up driver probe errors handling

[Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Properly clean up allocated resources on the drivers probe failure and
remove unneeded checks.

Signed-off-by: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/iommu/tegra-gart.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 6dda7ee1d36c..e9524ed264cf 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -408,9 +408,6 @@ static int tegra_gart_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	if (gart_handle)
-		return -EIO;
-
 	BUILD_BUG_ON(PAGE_SHIFT != GART_PAGE_SHIFT);
 
 	/* the GART memory aperture is required */
@@ -445,8 +442,7 @@ static int tegra_gart_probe(struct platform_device *pdev)
 	ret = iommu_device_register(&gart->iommu);
 	if (ret) {
 		dev_err(dev, "Failed to register IOMMU\n");
-		iommu_device_sysfs_remove(&gart->iommu);
-		return ret;
+		goto remove_sysfs;
 	}
 
 	gart->dev = &pdev->dev;
@@ -460,7 +456,8 @@ static int tegra_gart_probe(struct platform_device *pdev)
 	gart->savedata = vmalloc(array_size(sizeof(u32), gart->page_count));
 	if (!gart->savedata) {
 		dev_err(dev, "failed to allocate context save area\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto unregister_iommu;
 	}
 
 	platform_set_drvdata(pdev, gart);
@@ -469,6 +466,13 @@ static int tegra_gart_probe(struct platform_device *pdev)
 	gart_handle = gart;
 
 	return 0;
+
+unregister_iommu:
+	iommu_device_unregister(&gart->iommu);
+remove_sysfs:
+	iommu_device_sysfs_remove(&gart->iommu);
+
+	return ret;
 }
 
 static int tegra_gart_remove(struct platform_device *pdev)
-- 
2.19.0