RE: [PATCH rc v4 3/5] iommu/arm-smmu-v3: Skip EVTQ/PRIQ setup in kdump kernel

[Tian, Kevin]

> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Sent: Wednesday, April 29, 2026 3:21 PM
> 
> In kdump cases, the crashed kernel's CDs and page tables can be corrupted,
> which could trigger event spamming. Also, we cannot serve page requests.
> 
> Skip the EVTQ/PRIQ setup entirely rather than enabling then disabling them.

this is a refactoring to achieve the same goal as before...

> 
> Skip the IRQ setup and guard their thread functions as well.

... while this sounds a new enforcement (then better in a separate patch?)

> 
> Also add some inline comments explaining that.
> 
> Fixes: b63b3439b856 ("iommu/arm-smmu-v3: Abort all transactions if SMMU
> is enabled in kdump kernel")
> Cc: stable@xxxxxxxxxxxxxxx # v6.12+
> Suggested-by: Kevin Tian <kevin.tian@xxxxxxxxx>
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>

Overall it looks good:

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>