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| author | Hiroshi Doyu <hdoyu@nvidia.com> | 2012-06-25 14:23:56 +0300 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-25 13:50:43 +0200 |
| commit | a3b24915456b63c9002e94152e122b07de5566f2 (patch) | |
| tree | ef3cedd11e82d15e652fd5bcdd5dffd2db7dd18c /drivers/iommu | |
| parent | 0760e8faa960f8ee991fa4acb802db4e20661281 (diff) | |
| download | linux-3.10-a3b24915456b63c9002e94152e122b07de5566f2.tar.gz linux-3.10-a3b24915456b63c9002e94152e122b07de5566f2.tar.bz2 linux-3.10-a3b24915456b63c9002e94152e122b07de5566f2.zip | |
iommu/tegra: smmu: Simplify allocation at once
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 29 |
1 files changed, 9 insertions, 20 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 2c92b8c3514..98fcc7268ea 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -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]; |