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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2022-07-12 08:09:00 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-07-15 10:21:38 +0200 |
| commit | db75c9573b08e28109cf7b4ceb62b5f11154742e (patch) | |
| tree | 1e90f36db7f6961540c3f0b0b9e3c63f9410bf09 /drivers/iommu | |
| parent | 79d82ce4027f30c4d40fdf377888203f76b7ddcc (diff) | |
| download | lwn-db75c9573b08e28109cf7b4ceb62b5f11154742e.tar.gz lwn-db75c9573b08e28109cf7b4ceb62b5f11154742e.zip | |
iommu/vt-d: Fold __dmar_remove_one_dev_info() into its caller
Fold __dmar_remove_one_dev_info() into dmar_remove_one_dev_info() which
is its only caller. Make the spin lock critical range only cover the
device list change code and remove some unnecessary checks.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20220706025524.2904370-10-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 32 |
1 files changed, 8 insertions, 24 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index a94fb69e1f9a..ccddf634fae9 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -295,7 +295,6 @@ static LIST_HEAD(dmar_satc_units); static int g_num_of_iommus; static void dmar_remove_one_dev_info(struct device *dev); -static void __dmar_remove_one_dev_info(struct device_domain_info *info); int dmar_disabled = !IS_ENABLED(CONFIG_INTEL_IOMMU_DEFAULT_ON); int intel_iommu_sm = IS_ENABLED(CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON); @@ -4137,20 +4136,12 @@ static void domain_context_clear(struct device_domain_info *info) &domain_context_clear_one_cb, info); } -static void __dmar_remove_one_dev_info(struct device_domain_info *info) +static void dmar_remove_one_dev_info(struct device *dev) { - struct dmar_domain *domain; - struct intel_iommu *iommu; - - assert_spin_locked(&device_domain_lock); - - if (WARN_ON(!info)) - return; - - iommu = info->iommu; - domain = info->domain; + struct device_domain_info *info = dev_iommu_priv_get(dev); + struct intel_iommu *iommu = info->iommu; - if (info->dev && !dev_is_real_dma_subdevice(info->dev)) { + if (!dev_is_real_dma_subdevice(info->dev)) { if (dev_is_pci(info->dev) && sm_supported(iommu)) intel_pasid_tear_down_entry(iommu, info->dev, PASID_RID2PASID, false); @@ -4160,19 +4151,12 @@ static void __dmar_remove_one_dev_info(struct device_domain_info *info) intel_pasid_free_table(info->dev); } - list_del(&info->link); - domain_detach_iommu(domain, iommu); -} - -static void dmar_remove_one_dev_info(struct device *dev) -{ - struct device_domain_info *info; - spin_lock(&device_domain_lock); - info = dev_iommu_priv_get(dev); - if (info) - __dmar_remove_one_dev_info(info); + list_del(&info->link); spin_unlock(&device_domain_lock); + + domain_detach_iommu(info->domain, iommu); + info->domain = NULL; } static int md_domain_init(struct dmar_domain *domain, int guest_width) |