mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-28 03:40:04 +00:00
Code Issues Releases Wiki Activity

iommu/amd: Fix group refcounting

Browse source 
If acpihid_device_group() finds an existing group for the relevant
devid, it should be taking an additional reference on that group.
Otherwise, the caller of iommu_group_get_for_dev() will inadvertently
remove the reference taken by iommu_group_add_device(), and the group
will be freed prematurely if any device is removed.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2016-11-11 17:59:23 +00:00 committed by Joerg Roedel
parent e1b44cbe7b
commit f2f101f6bc
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/iommu/amd_iommu.c
View file

@ -373,6 +373,8 @@ static struct iommu_group *acpihid_device_group(struct device *dev)
if (!entry->group)
entry->group = generic_device_group(dev);
else
iommu_group_ref_get(entry->group);
return entry->group;
}