linux-kernel - Re: [PATCH v12 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

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Message-ID: <4e5bc823-0a98-da39-9f01-af819ee675ef@quicinc.com>
Date:   Tue, 6 Sep 2022 08:18:19 +0530
From:   Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>
CC:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <quic_pkondeti@...cinc.com>,
        <quic_ppratap@...cinc.com>, <quic_vpulyala@...cinc.com>
Subject: Re: [PATCH v12 2/3] phy: qcom-snps: Add support for overriding phy
 tuning parameters



On 9/6/2022 8:15 AM, Bjorn Andersson wrote:
> On Sat, Sep 03, 2022 at 04:00:47PM +0530, Krishna Kurapati wrote:
> [..]
>> +static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
>> +{
>> +	struct device_node *node = dev->of_node;
>> +	s32 val;
>> +	int ret, i;
>> +	struct qcom_snps_hsphy *hsphy;
>> +	const struct override_param_map *cfg = of_device_get_match_data(dev);
> 
> Given that you don't have any .data specified for the other compatibles
> (which is fine), cfg would be NULL here and below loop would attempt to
> access NULL[0].prop_name and crash.
> 
> Please add a check for !cfg and just return here.
> 
> With that I think the series looks good.
> 
> Regards,
> Bjorn
My bad. Missed this before. Thanks for pointing it out.
Will push updated changes.

Thanks,
Krishna,