Re: iwlwifi: Regression after migrating to 6.6.32

[Baochen Qiang]

On 6/13/2024 3:15 AM, Fabio Estevam wrote:
> Hi Johannes,
> 
> On Wed, Jun 12, 2024 at 4:10 PM Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
> 
>> Strange. Is there an IOMMU involved on this platform?
> 
> IOMMU isn't available on i.MX8M as far as I know.
If IOMMU not present, likely the buffer is mapped by SWIOTLB. The iova 4215433216, aka 0xFB426800, is 2K aligned, which also supports such guessing. See definition of IO_TLB_SIZE.

> 
> Interestingly, such a warning does not happen with the 5.10 kernel.
> 
> I only noticed it yesterday, after migrating to 6.6.32.
> 
> Thanks
>