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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: cd6438c5f8 ("iommu/rockchip: Reconstruct to support multi slaves")

Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Shunqian Zheng 2016-06-24 10:13:28 +08:00 committed by Joerg Roedel
parent e6d0f4737c
commit 3d08f434bd
1 changed files with 4 additions and 2 deletions
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6
drivers/iommu/rockchip-iommu.c
View File

@ -1034,6 +1034,7 @@ 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);
@ -1043,12 +1044,13 @@ 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;