Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20230124182857.1524912-1-amit.pundir@linaro.org>
 <39751511-3f06-7c39-9c21-208d4c272113@linaro.org> <CAA8EJppLBuA08hkqTrZx_wwbtCxK9sAjv48c9_DxgPENgo7a8Q@mail.gmail.com>
 <1a840d88-e5b1-711c-b980-f57620c54472@linaro.org> <8508e3d5-7468-0b2f-5a43-7c439ecf2d8b@linaro.org>
 <CAMi1Hd2UNxXHUVWO-=sWh=-bVnrqE3UdLguFOq+62SfvUiEs0A@mail.gmail.com> <b2307e91-3373-539a-ecfb-e2542b9f83db@linaro.org>
In-Reply-To: <b2307e91-3373-539a-ecfb-e2542b9f83db@linaro.org>
From:   Amit Pundir <amit.pundir@linaro.org>
Date:   Mon, 10 Apr 2023 14:24:07 +0530
Message-ID: <CAMi1Hd2xfH-=htvHFQRktdgtDwiXKKvFo+9hook4HCJCPY6ydA@mail.gmail.com>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845-db845c: Mark cont splash memory
 region as reserved
To:     "Bryan O'Donoghue" <bryan.odonoghue@linaro.org>
Cc:     Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Caleb Connolly <caleb.connolly@linaro.org>,
        linux-arm-msm <linux-arm-msm@vger.kernel.org>,
        dt <devicetree@vger.kernel.org>,
        lkml <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, 9 Feb 2023 at 16:33, Bryan O'Donoghue
<bryan.odonoghue@linaro.org> wrote:
>
> On 09/02/2023 09:05, Amit Pundir wrote:
> > Hi, So what is the verdict on this patch?
> >
> > I submitted this fix to make sure UFS don't map and crash on it, which
> > I have seen happening occassionaly on db845c and Caleb reported
> > similar issues on his sdm845 device iirc. I should have probably put
> > that in my commit message as well.
> >
> > Regards,
> > Amit Pundir
>
> So the memory _is_ being used by ... continuous splash on an Android
> image, i.e. your Android ? limited to Android - image continues on with
> the splash but other blocks erroneously reuse the memory then, UFS as an
> example ?

Hi Bryan,

Yes UFS (reported only on v5.10) tries to map this reserved memory and
system crash and reboot. Plan is to backport this patch to v5.10.y.

Regards,
Amit Pundir

>
> ---
> bod