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Commit a3b24915 authored by Hiroshi Doyu's avatar Hiroshi Doyu Committed by Joerg Roedel
Browse files

iommu/tegra: smmu: Simplify allocation at once 



To simplify the code, alloc necessary data at once.

Signed-off-by: default avatarHiroshi DOYU <hdoyu@nvidia.com>
Acked-by: default avatarStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 0760e8fa

drivers/iommu/tegra-smmu.c

+9 −20
Original line number Diff line number Diff line
@@ -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];