From 322a9bbb720cd273d2967a375d1887199b361528 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Thu, 26 Dec 2019 18:50:56 +0900 Subject: [PATCH] iommu/arm-smmu-v3: Fix resource_size check This is an off-by-one mistake. resource_size() returns res->end - res->start + 1. Reviewed-by: Robin Murphy Signed-off-by: Masahiro Yamada Signed-off-by: Will Deacon --- drivers/iommu/arm-smmu-v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index a4ee956b8968..5c42c686cffe 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -3632,7 +3632,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev) /* Base address */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (resource_size(res) + 1 < arm_smmu_resource_size(smmu)) { + if (resource_size(res) < arm_smmu_resource_size(smmu)) { dev_err(dev, "MMIO region too small (%pr)\n", res); return -EINVAL; } -- 2.11.0