iommu/arm-smmu: Add NULL check for platform_get_resource return value



platform_get_resource return value 'res' can be NULL. NULL check
platform_get_resource return value before derefereing.

Change-Id: Ifba91104428c5279fad21f892840c67ce4258aee
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>

parent 0e01c2e9

drivers/iommu/arm-smmu.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -4396,7 +4396,11 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
		smmu->arch_ops = data->arch_ops;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (res)
		if (res == NULL) {
		dev_err(dev, "no MEM resource info\n");
		return -EINVAL;
		}

		smmu->phys_addr = res->start;
		smmu->base = devm_ioremap_resource(dev, res);
		if (IS_ERR(smmu->base))