iommu/amd: Fix group refcounting

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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>

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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

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drivers/iommu/amd_iommu.c

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