From: Shunqian Zheng Date: Fri, 24 Jun 2016 02:13:28 +0000 (+0800) Subject: UPSTREAM: iommu/rockchip: Fix allocation of bases array in driver probe X-Git-Tag: firefly_0821_release~1213 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4ba9328836ff43c11aa89d5308f24607a7a191c9;p=firefly-linux-kernel-4.4.55.git UPSTREAM: iommu/rockchip: Fix allocation of bases array in driver probe In .probe(), devm_kzalloc() is called with size == 0 and works only by luck, due to internal behavior of the allocator and the fact that the proper allocation size is small. Let's use proper value for calculating the size. Fixes: cd6438c5f844 ("iommu/rockchip: Reconstruct to support multi slaves") Signed-off-by: Shunqian Zheng Signed-off-by: Tomasz Figa Reviewed-by: Douglas Anderson Signed-off-by: Joerg Roedel (cherry picked from commit 3d08f434bd58656ae630376d0b5afd6ca1ffb013) Change-Id: I78db8fbf3cb781745a05f8bee492dd7e8ac784c5 Signed-off-by: Jeffy Chen --- diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 6c907698c9d1..41761d223175 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -1041,6 +1041,7 @@ static int rk_iommu_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct rk_iommu *iommu; struct resource *res; + int num_res = pdev->num_resources; int i; iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL); @@ -1050,12 +1051,13 @@ static int rk_iommu_probe(struct platform_device *pdev) platform_set_drvdata(pdev, iommu); iommu->dev = dev; iommu->num_mmu = 0; - iommu->bases = devm_kzalloc(dev, sizeof(*iommu->bases) * iommu->num_mmu, + + iommu->bases = devm_kzalloc(dev, sizeof(*iommu->bases) * num_res, GFP_KERNEL); if (!iommu->bases) return -ENOMEM; - for (i = 0; i < pdev->num_resources; i++) { + for (i = 0; i < num_res; i++) { res = platform_get_resource(pdev, IORESOURCE_MEM, i); if (!res) continue;