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Commit 2e757086 authored by Shuah Khan's avatar Shuah Khan Committed by Joerg Roedel
Browse files

iommu: Change iommu driver to call remove_device_to_group trace event 



Change iommu driver to call remove_device_to_group trace event. This
iommu_group class event can be enabled to trigger when devices get
removed from an iommu group. Trace information includes iommu group id and
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] ....     1.854101: remove_device_from_group: IOMMU: groupID=0 device=0000:00:02.0

Signed-off-by: default avatarShuah Khan <shuah.kh@samsung.com>
Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent d1cf7e82

drivers/iommu/iommu.c

+2 −0
Original line number Diff line number Diff line
@@ -402,6 +402,8 @@ void iommu_group_remove_device(struct device *dev) 
	sysfs_remove_link(group->devices_kobj, device->name);

	sysfs_remove_link(&dev->kobj, "iommu_group");



	trace_remove_device_from_group(group->id, dev);



	kfree(device->name);

	kfree(device);

	dev->iommu_group = NULL;