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Subject[PATCH v2 02/11] iommu/vt-d: Remove finding domain in dmar_insert_one_dev_info()
Date
The Intel IOMMU driver has already converted to use default domain
framework in iommu core. There's no need to find a domain for the
device in the domain attaching path. Cleanup that code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/iommu/intel/iommu.c | 21 ---------------------
1 file changed, 21 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e3b04d5d87b0..b3075933864e 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2554,7 +2554,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
struct device *dev,
struct dmar_domain *domain)
{
- struct dmar_domain *found = NULL;
struct device_domain_info *info;
unsigned long flags;
int ret;
@@ -2605,26 +2604,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
}

spin_lock_irqsave(&device_domain_lock, flags);
- if (dev)
- found = find_domain(dev);
-
- if (!found) {
- struct device_domain_info *info2;
- info2 = dmar_search_domain_by_dev_info(info->segment, info->bus,
- info->devfn);
- if (info2) {
- found = info2->domain;
- info2->dev = dev;
- }
- }
-
- if (found) {
- spin_unlock_irqrestore(&device_domain_lock, flags);
- free_devinfo_mem(info);
- /* Caller must free the original domain */
- return found;
- }
-
spin_lock(&iommu->lock);
ret = domain_attach_iommu(domain, iommu);
spin_unlock(&iommu->lock);
--
2.25.1
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