This is a note to let you know that I've just added the patch titled iommu/sun50i: Remove IOMMU_DOMAIN_IDENTITY to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iommu-sun50i-remove-iommu_domain_identity.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 6df70a3f758336d8061155c97345441c7ed27f6f Author: Jason Gunthorpe <jgg@xxxxxxxx> Date: Mon Nov 28 10:06:28 2022 -0400 iommu/sun50i: Remove IOMMU_DOMAIN_IDENTITY [ Upstream commit ef5bb8e7a7127218f826b9ccdf7508e7a339f4c2 ] This driver treats IOMMU_DOMAIN_IDENTITY the same as UNMANAGED, which cannot possibly be correct. UNMANAGED domains are required to start out blocking all DMAs. This seems to be what this driver does as it allocates a first level 'dt' for the IO page table that is 0 filled. Thus UNMANAGED looks like a working IO page table, and so IDENTITY must be a mistake. Remove it. Fixes: 4100b8c229b3 ("iommu: Add Allwinner H6 IOMMU driver") Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx> Link: https://lore.kernel.org/r/0-v1-97f0adf27b5e+1f0-s50_identity_jgg@xxxxxxxxxx Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c index 5cb2d44dfb92..5b585eace3d4 100644 --- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -672,7 +672,6 @@ static struct iommu_domain *sun50i_iommu_domain_alloc(unsigned type) struct sun50i_iommu_domain *sun50i_domain; if (type != IOMMU_DOMAIN_DMA && - type != IOMMU_DOMAIN_IDENTITY && type != IOMMU_DOMAIN_UNMANAGED) return NULL;