linux-kernel - Re: [PATCH v3 4/6] scsi: ufs: host: Add support for parsing OPP

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Message-ID: <20230801090333.pqqugj4tcarwdl2o@vireshk-i7>
Date:   Tue, 1 Aug 2023 14:33:33 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     vireshk@...nel.org, nm@...com, sboyd@...nel.org,
        myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
        cw00.choi@...sung.com, andersson@...nel.org,
        konrad.dybcio@...aro.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        jejb@...ux.ibm.com, martin.petersen@...cle.com,
        alim.akhtar@...sung.com, avri.altman@....com, bvanassche@....org,
        linux-scsi@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
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        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/6] scsi: ufs: host: Add support for parsing OPP

On 31-07-23, 22:03, Manivannan Sadhasivam wrote:
> +int ufshcd_opp_config_clks(struct device *dev, struct opp_table *opp_table,
> +			   struct dev_pm_opp *opp, void *data,
> +			   bool scaling_down)
> +{
> +	struct ufs_hba *hba = dev_get_drvdata(dev);
> +	struct list_head *head = &hba->clk_list_head;
> +	struct ufs_clk_info *clki;
> +	unsigned long freq;
> +	u8 idx = 0;
> +	int ret;
> +
> +	list_for_each_entry(clki, head, list) {
> +		if (!IS_ERR_OR_NULL(clki->clk)) {

NULL is considered as a valid clock AFAIR, so you must only be doing
IS_ERR() here I guess.

-- 
viresh