netdev - Re: [PATCH 11/18] iommu/fsl_pamu: remove the snoop

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Message-ID: <20210330125816.GK5908@willie-the-truck>
Date:   Tue, 30 Mar 2021 13:58:17 +0100
From:   Will Deacon <will@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Joerg Roedel <joro@...tes.org>, Li Yang <leoyang.li@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [PATCH 11/18] iommu/fsl_pamu: remove the snoop_id field

On Tue, Mar 16, 2021 at 04:38:17PM +0100, Christoph Hellwig wrote:
> The snoop_id is always set to ~(u32)0.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> Acked-by: Li Yang <leoyang.li@....com>
> ---
>  drivers/iommu/fsl_pamu_domain.c | 5 ++---
>  drivers/iommu/fsl_pamu_domain.h | 1 -
>  2 files changed, 2 insertions(+), 4 deletions(-)

pamu_config_ppaace() takes quite a few useless parameters at this stage,
but anyway:

Acked-by: Will Deacon <will@...nel.org>

Do you know if this driver is actually useful? Once the complexity has been
stripped back, the stubs and default values really stand out.

Will