linux-kernel - Re: [PATCH] iommu/qcom: Use domain rather than dev as tlb cookie

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Date:   Wed, 22 Jul 2020 07:54:40 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        "list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg
        Roedel <joro@...tes.org>," <iommu@...ts.linux-foundation.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Robin Murphy <robin.murphy@....com>,
        Rob Clark <robdclark@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, lkft-triage@...ts.linaro.org
Subject: Re: [PATCH] iommu/qcom: Use domain rather than dev as tlb cookie

On Wed, Jul 22, 2020 at 6:10 AM Joerg Roedel <joro@...tes.org> wrote:
>
> On Tue, Jul 21, 2020 at 12:45:17AM +0530, Naresh Kamboju wrote:
> > On Mon, 20 Jul 2020 at 21:21, Rob Clark <robdclark@...il.com> wrote:
> > >
> > > From: Rob Clark <robdclark@...omium.org>
> > >
> > > The device may be torn down, but the domain should still be valid.  Lets
> > > use that as the tlb flush ops cookie.
> > >
> > > Fixes a problem reported in [1]
> >
> > This proposed fix patch applied on top of linux mainline master
> > and boot test PASS on db410c.
> >
> > The reported problem got fixed.
>
> Is this needed for v5.8/stable? A fixes tag would be great too.

looks like, yes:

Fixes: 09b5dfff9ad6 ("iommu/qcom: Use accessor functions for iommu
private data")

BR,
-R

>
> Regards,
>
>         Joerg