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iommu: Use right function to get group for device

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The iommu_group_get_for_dev() will allocate a group for a
device if it isn't in any group. This isn't the use case
in iommu_request_dm_for_dev(). Let's use iommu_group_get()
instead.

Fixes: d290f1e70d ("iommu: Introduce iommu_request_dm_for_dev()")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2019-05-21 15:27:35 +08:00 committed by Joerg Roedel
parent cd6c84d8f0
commit 57274ea257
1 changed files with 3 additions and 3 deletions
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6
drivers/iommu/iommu.c
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@ -1915,9 +1915,9 @@ int iommu_request_dm_for_dev(struct device *dev)
int ret;
/* Device must already be in a group before calling this function */
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
group = iommu_group_get(dev);
if (!group)
return -EINVAL;
mutex_lock(&group->mutex);