From 269aa808a990b3fdd0e7ec9e04322284c40748c4 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 28 May 2015 18:41:25 +0200 Subject: [PATCH] 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 --- drivers/iommu/iommu.c | 9 +++++++++ 1 file changed, 9 insertions(+) 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 @@ static void iommu_group_release(struct kobject *kobj) { 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 @@ again: */ kobject_put(&group->kobj); + pr_debug("Allocated group %d\n", group->id); + return group; } EXPORT_SYMBOL_GPL(iommu_group_alloc); @@ -372,6 +376,9 @@ rename: 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 @@ void iommu_group_remove_device(struct device *dev) 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); -- 2.7.4