linux-kernel - Re: [PATCH v2] iommu/qcom: fix NULL pointer dereference during probe deferral

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Message-ID: <4ed8542a-40fe-ae34-4203-efbcf285d784@arm.com>
Date:   Tue, 18 Feb 2020 14:27:20 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Stephan Gerhold <stephan@...hold.net>
Cc:     Brian Masney <masneyb@...tation.org>, robdclark@...il.com,
        bjorn.andersson@...aro.org, joro@...tes.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        j.neuschaefer@....net, iommu@...ts.linux-foundation.org,
        agross@...nel.org, Naresh Kamboju <naresh.kamboju@...aro.org>
Subject: Re: [PATCH v2] iommu/qcom: fix NULL pointer dereference during probe
 deferral

On 18/02/2020 12:04 pm, Stephan Gerhold wrote:
[...]
> Are you going to send a patch for the diff below?
> AFAICT this problem still exists in 5.6-rc2.
> 
> Your patch also seems to fix a warning during probe deferral on arm64
> that has been around for quite a while. (At least for me...)
> 
> (See https://lore.kernel.org/linux-iommu/CA+G9fYtScOpkLvx=__gP903uJ2v87RwZgkAuL6RpF9_DTDs9Zw@mail.gmail.com/)

Ha, I did see that and vaguely remembered a discussion about that 
warning logic being broken, but I'd totally forgotten I was involved to 
that extent :)

Luckily I've managed to track the diff down in my Git stash, so I'll 
write it up properly - thanks for the reminder!

Robin.