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| author |   Marek Szyprowski <m.szyprowski@samsung.com> | 2016-02-18 15:12:48 +0100 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2016-02-25 15:32:08 +0100 |
| commit | 6c2ae7e2916b028bd4c0fff04589bd176487a122 (patch) | |
| tree | 4e76d6838f98bb77ea13e6acfcf8959892570895 /drivers/iommu/exynos-iommu.c | |
| parent | Linux 4.5-rc5 (diff) | |
| download | linux-dev-6c2ae7e2916b028bd4c0fff04589bd176487a122.tar.xz linux-dev-6c2ae7e2916b028bd4c0fff04589bd176487a122.zip | |
iommu/exynos: Rework iommu group initialization
This patch replaces custom code in add_device implementation with
iommu_group_get_for_dev() call and provides the needed callback.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 97c41b8ab5d9..4fc079073c86 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1114,28 +1114,32 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain, return phys; } +static struct iommu_group *get_device_iommu_group(struct device *dev) +{ + struct iommu_group *group; + + group = iommu_group_get(dev); + if (!group) + group = iommu_group_alloc(); + + return group; +} + static int exynos_iommu_add_device(struct device *dev) { struct iommu_group *group; - int ret; if (!has_sysmmu(dev)) return -ENODEV; - group = iommu_group_get(dev); + group = iommu_group_get_for_dev(dev); - if (!group) { - group = iommu_group_alloc(); - if (IS_ERR(group)) { - dev_err(dev, "Failed to allocate IOMMU group\n"); - return PTR_ERR(group); - } - } + if (IS_ERR(group)) + return PTR_ERR(group); - ret = iommu_group_add_device(group, dev); iommu_group_put(group); - return ret; + return 0; } static void exynos_iommu_remove_device(struct device *dev) @@ -1182,6 +1186,7 @@ static struct iommu_ops exynos_iommu_ops = { .unmap = exynos_iommu_unmap, .map_sg = default_iommu_map_sg, .iova_to_phys = exynos_iommu_iova_to_phys, + .device_group = get_device_iommu_group, .add_device = exynos_iommu_add_device, .remove_device = exynos_iommu_remove_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE, |