From: Shuah Khan Date: Thu, 15 Aug 2013 17:59:25 +0000 (-0600) Subject: iommu: Change iommu driver to call remove_device_to_group trace event X-Git-Tag: firefly_0821_release~176^2~4966^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2e757086bdfdc9450dc2e4a5d2ec5431520a02c8;p=firefly-linux-kernel-4.4.55.git 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: Shuah Khan Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 349c92dfce05..278055bd0715 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -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;