Hi Greg,
On 2021/8/16 19:48, Greg Kroah-Hartman wrote:
On Mon, Aug 16, 2021 at 07:39:32PM +0800, Lu Baolu wrote:
From: Saeed Mirzamohammadi <saeed.mirzamohammadi@xxxxxxxxxx>
[ Upstream commit 327d5b2fee91c404a3956c324193892cf2cc9528 ]
Also, this really does not look like this commit at all :(
This is not a back port. It's a fix for some stable kernels. Sorry for
the confusion.
The error happens in a helper function that has been deprecated in the
upstream kernel by above commit. I added below explanation in the commit
message:
"
This issue happens on the code path of getting a private domain for a
device. A private domain was needed when the domain of an iommu group
couldn't meet the requirement of a device. The IOMMU core has been
evolved to eliminate the need for private domain, hence this code path
has already been removed from the upstream since commit 327d5b2fee91c
("iommu/vt-d: Allow 32bit devices to uses DMA domain"). Instead of back
porting all patches that are required for removing the private domain,
this simply fixes it in the affected stable kernel between v4.16 and v5.7.
"
I'm sorry if this is not the right way to do this.
Best regards,
baolu
