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Date:   Wed, 3 Aug 2022 10:33:29 -0700
From:   Matthias Kaehlcke <mka@chromium.org>
To:     Johan Hovold <johan+linaro@kernel.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Felipe Balbi <balbi@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Krishna Kurapati <quic_kriskura@quicinc.com>,
        Stephen Boyd <swboyd@chromium.org>,
        Doug Anderson <dianders@chromium.org>,
        Pavankumar Kondeti <quic_pkondeti@quicinc.com>,
        quic_ppratap@quicinc.com, quic_vpulyala@quicinc.com,
        linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        stable@vger.kernel.org
Subject: Re: [PATCH 1/8] usb: dwc3: fix PHY disable sequence
Message-ID: <Yuqxaf2nvegDyLtp@google.com>
References: <20220802151404.1797-1-johan+linaro@kernel.org>
 <20220802151404.1797-2-johan+linaro@kernel.org>
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On Tue, Aug 02, 2022 at 05:13:57PM +0200, Johan Hovold wrote:
> Generic PHYs must be powered-off before they can be tore down.
> 
> Similarly, suspending legacy PHYs after having powered them off makes no
> sense.
> 
> Fix the dwc3_core_exit() (e.g. called during suspend) and open-coded
> dwc3_probe() error-path sequences that got this wrong.
> 
> Note that this makes dwc3_core_exit() match the dwc3_core_init() error
> path with respect to powering off the PHYs.
> 
> Fixes: 03c1fd622f72 ("usb: dwc3: core: add phy cleanup for probe error handling")
> Fixes: c499ff71ff2a ("usb: dwc3: core: re-factor init and exit paths")
> Cc: stable@vger.kernel.org      # 4.8
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>

I also wondered about this earlier, but didn't take action.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>