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SubjectRe: [PATCH v5 19/20] iommu/mediatek: Add shutdown callback
On Mon, Dec 31, 2018 at 8:00 PM Yong Wu <> wrote:
> In the reboot burning test, if some Multimedia HW has something wrong,
> It may keep send the invalid request to IOMMU. In order to avoid
> affect the reboot flow, we add the shutdown callback to disable
> M4U HW when shutdown.

Sounds unpleasant. Hopefully the reboot flow still continues properly
even in that case, since this shutdown code may not run during some
rougher resets.

Reviewed-by: Evan Green <>

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