iommu/vt-d: Move deferred device attachment into helper function

Move the code that does the deferred device attachment into a separate
helper function.

Fixes: 1ee0186b9a12 ("iommu/vt-d: Refactor find_domain() helper")
Cc: stable@vger.kernel.org # v5.5
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 80f2332a5466c96dd6b11f3fd99a8751f3b5cb17..42cdcce1602ebaedb5c39a3d494ad7af8bd040cb 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2529,16 +2529,20 @@ struct dmar_domain *find_domain(struct device *dev)
        return NULL;
 }
 
-static struct dmar_domain *deferred_attach_domain(struct device *dev)
+static void do_deferred_attach(struct device *dev)
 {
-       if (unlikely(attach_deferred(dev))) {
-               struct iommu_domain *domain;
+       struct iommu_domain *domain;
 
-               dev->archdata.iommu = NULL;
-               domain = iommu_get_domain_for_dev(dev);
-               if (domain)
-                       intel_iommu_attach_device(domain, dev);
-       }
+       dev->archdata.iommu = NULL;
+       domain = iommu_get_domain_for_dev(dev);
+       if (domain)
+               intel_iommu_attach_device(domain, dev);
+}
+
+static struct dmar_domain *deferred_attach_domain(struct device *dev)
+{
+       if (unlikely(attach_deferred(dev)))
+               do_deferred_attach(dev);
 
        return find_domain(dev);
 }