Re: [PATCH] drm/msm: Wire up tlb ops

[Rob Clark]

On Wed, Feb 14, 2024 at 11:34 PM Johan Hovold <johan@xxxxxxxxxx> wrote:
>
> On Tue, Feb 13, 2024 at 09:23:40AM -0800, Rob Clark wrote:
> > From: Rob Clark <robdclark@xxxxxxxxxxxx>
> >
> > The brute force iommu_flush_iotlb_all() was good enough for unmap, but
> > in some cases a map operation could require removing a table pte entry
> > to replace with a block entry.  This also requires tlb invalidation.
> > Missing this was resulting an obscure iova fault on what should be a
> > valid buffer address.
> >
> > Thanks to Robin Murphy for helping me understand the cause of the fault.
> >
> > Cc: Robin Murphy <robin.murphy@xxxxxxx>
> > Fixes: b145c6e65eb0 ("drm/msm: Add support to create a local pagetable")
>
> Sounds like you're missing a
>
> Cc: stable@xxxxxxxxxxxxxxx
>
> here? Or is there some reason not to backport this fix (to 5.9 and later
> kernels)?

No reason, I just expected the Fixes tag was sufficient

BR,
-R

> > Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> Johan