Re: [PATCH v11 10/27] iommu/exynos: use managed device helper functions

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Hi KyongHo,

On 14.03.2014 06:05, Cho KyongHo wrote:
This patch uses managed device helper functions in the probe().

Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
---
  drivers/iommu/exynos-iommu.c |   64 +++++++++++++++++-------------------------
  1 file changed, 26 insertions(+), 38 deletions(-)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 36e6b73..33b424d 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -499,51 +499,48 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev)

  static int exynos_sysmmu_probe(struct platform_device *pdev)
  {
-	int ret;
+	int irq, ret;
  	struct device *dev = &pdev->dev;
  	struct sysmmu_drvdata *data;
  	struct resource *res;

-	data = kzalloc(sizeof(*data), GFP_KERNEL);
-	if (!data) {
-		dev_dbg(dev, "Not enough memory\n");
-		ret = -ENOMEM;
-		goto err_alloc;
-	}
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;

  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!res) {
-		dev_dbg(dev, "Unable to find IOMEM region\n");
-		ret = -ENOENT;
-		goto err_init;
+		dev_err(dev, "Unable to find IOMEM region\n");
+		return -ENOENT;
  	}

No need to check for error and print message, because devm_ioremap_resource() already checks the passed resource and handles error cases.

Best regards,
Tomasz
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