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iommu: Change iommu driver to call detach_device_to_domain trace event 

Change iommu driver to call detach_device_to_domain trace event. This
iommu_device class event can be enabled to trigger when devices are detached
from a domain. Trace information includes device name.

Testing:
Added trace calls to iommu_prepare_identity_map() for testing some of the
conditions that are hard to trigger. Here is the trace from the testing:

       swapper/0-1     [003] ....     1.854102: detach_device_from_domain: IOMMU: device=0000:00:02.0

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
hifive-unleashed-5.1
Shuah Khan 2013-08-15 11:59:27 -06:00 committed by Joerg Roedel
parent b54db77885
commit 699806302d
1 changed files with 1 additions and 0 deletions
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drivers/iommu/iommu.c
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@ -702,6 +702,7 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
return;
domain->ops->detach_dev(domain, dev);
trace_detach_device_from_domain(dev);
}
EXPORT_SYMBOL_GPL(iommu_detach_device);