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Code Issues Releases Wiki Activity

iommu: set group default domain before creating direct mappings 

iommu_group_create_direct_mappings uses group->default_domain, but
right after it is called, request_default_domain_for_dev calls
iommu_domain_free for the default domain, and sets the group default
domain to a different domain. Move the
iommu_group_create_direct_mappings call to after the group default
domain is set, so the direct mappings get associated with that domain.

Cc: Joerg Roedel <jroedel@suse.de>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: stable@vger.kernel.org
Fixes: 7423e01741 ("iommu: Add API to request DMA domain for device")
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jerry Snitselaar 2019-12-10 11:56:06 -07:00 committed by Joerg Roedel
parent 75d1838539
commit d360211524
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/iommu.c
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@ -2282,13 +2282,13 @@ request_default_domain_for_dev(struct device *dev, unsigned long type)
goto out;
}
iommu_group_create_direct_mappings(group, dev);
/* Make the domain the default for this group */
if (group->default_domain)
iommu_domain_free(group->default_domain);
group->default_domain = domain;
iommu_group_create_direct_mappings(group, dev);
dev_info(dev, "Using iommu %s mapping\n",
type == IOMMU_DOMAIN_DMA ? "dma" : "direct");