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iommu/tegra: smmu: Simplify allocation at once

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To simplify the code, alloc necessary data at once.

Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Hiroshi Doyu 2012-06-25 14:23:56 +03:00 committed by Joerg Roedel
parent 0760e8faa9
commit a3b2491545
1 changed files with 9 additions and 20 deletions
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29
drivers/iommu/tegra-smmu.c
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@ -241,8 +241,6 @@ struct smmu_device {
spinlock_t lock;
char *name;
struct device *dev;
int num_as;
struct smmu_as *as; /* Run-time allocated array */
struct page *avp_vector_page; /* dummy page shared by all AS's */
/*
@ -254,6 +252,9 @@ struct smmu_device {
unsigned long asid_security;
struct device_node *ahb;
int num_as;
struct smmu_as as[0]; /* Run-time allocated array */
};
static struct smmu_device *smmu_handle; /* unique for a system */
@ -902,15 +903,18 @@ static int tegra_smmu_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
int i, asids, err = 0;
dma_addr_t base;
size_t size;
const void *prop;
size_t bytes, size;
if (smmu_handle)
return -EIO;
BUILD_BUG_ON(PAGE_SHIFT != SMMU_PAGE_SHIFT);
smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL);
if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
return -ENODEV;
bytes = sizeof(*smmu) + asids * sizeof(*smmu->as);
smmu = devm_kzalloc(dev, bytes, GFP_KERNEL);
if (!smmu) {
dev_err(dev, "failed to allocate smmu_device\n");
return -ENOMEM;
@ -938,13 +942,6 @@ static int tegra_smmu_probe(struct platform_device *pdev)
if (!size)
return -EINVAL;
prop = of_get_property(dev->of_node, "nvidia,#asids", NULL);
if (!prop)
return -ENODEV;
asids = be32_to_cpup(prop);
if (!asids)
return -ENODEV;
smmu->ahb = of_parse_phandle(dev->of_node, "nvidia,ahb", 0);
if (!smmu->ahb)
return -ENODEV;
@ -959,14 +956,6 @@ static int tegra_smmu_probe(struct platform_device *pdev)
smmu->translation_enable_2 = ~0;
smmu->asid_security = 0;
smmu->as = devm_kzalloc(dev,
sizeof(smmu->as[0]) * smmu->num_as, GFP_KERNEL);
if (!smmu->as) {
dev_err(dev, "failed to allocate smmu_as\n");
err = -ENOMEM;
goto fail;
}
for (i = 0; i < smmu->num_as; i++) {
struct smmu_as *as = &smmu->as[i];