iommu/arm-smmu: Clean up resource handling during Qualcomm context probe

Convert to use devm_platform_ioremap_resource() and fix return value
when platform_get_irq fails.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230705130416.46710-1-frank.li@vivo.com
Signed-off-by: Will Deacon <will@kernel.org>

Author: bbkzz

drivers/iommu/arm/arm-smmu/qcom_iommu.c

@@ -633,7 +633,6 @@ static int qcom_iommu_ctx_probe(struct platform_device *pdev)
 	struct qcom_iommu_ctx *ctx;
 	struct device *dev = &pdev->dev;
 	struct qcom_iommu_dev *qcom_iommu = dev_get_drvdata(dev->parent);
-	struct resource *res;
 	int ret, irq;
 
 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
@@ -643,14 +642,13 @@ static int qcom_iommu_ctx_probe(struct platform_device *pdev)
 	ctx->dev = dev;
 	platform_set_drvdata(pdev, ctx);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	ctx->base = devm_ioremap_resource(dev, res);
+	ctx->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ctx->base))
 		return PTR_ERR(ctx->base);
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return -ENODEV;
+		return irq;
 
 	/* clear IRQs before registering fault handler, just in case the
 	 * boot-loader left us a surprise: