Merge tag 'iommu-fix-v6.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...

Pull iommu fix from Joerg Roedel:

 - Fix boot regression for Sapphire Rapids with Intel VT-d driver

* tag 'iommu-fix-v6.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu: Avoid unnecessary cache invalidations

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3bfc56d..c146378 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1108,7 +1108,8 @@ map_end:
 
        }
 
-       iommu_flush_iotlb_all(domain);
+       if (!list_empty(&mappings) && iommu_is_dma_domain(domain))
+               iommu_flush_iotlb_all(domain);
 
 out:
        iommu_put_resv_regions(dev, &mappings);