iommu: Add a few printk messages to group handling code
Write a message to the kernel log when a device is added or
removed from a group and add debug messages to group
allocation and release routines.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index c31bfd0..755e488 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -128,6 +128,8 @@
{
struct iommu_group *group = to_iommu_group(kobj);
+ pr_debug("Releasing group %d\n", group->id);
+
if (group->iommu_data_release)
group->iommu_data_release(group->iommu_data);
@@ -207,6 +209,8 @@
*/
kobject_put(&group->kobj);
+ pr_debug("Allocated group %d\n", group->id);
+
return group;
}
EXPORT_SYMBOL_GPL(iommu_group_alloc);
@@ -372,6 +376,9 @@
IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev);
trace_add_device_to_group(group->id, dev);
+
+ pr_info("Adding device %s to group %d\n", dev_name(dev), group->id);
+
return 0;
}
EXPORT_SYMBOL_GPL(iommu_group_add_device);
@@ -388,6 +395,8 @@
struct iommu_group *group = dev->iommu_group;
struct iommu_device *tmp_device, *device = NULL;
+ pr_info("Removing device %s from group %d\n", dev_name(dev), group->id);
+
/* Pre-notify listeners that a device is being removed. */
blocking_notifier_call_chain(&group->notifier,
IOMMU_GROUP_NOTIFY_DEL_DEVICE, dev);