linux-kernel - Re: [PATCH] phy: qualcomm: call clk_disable

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Date:   Tue, 20 Sep 2022 15:30:28 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Dongliang Mu <dzm91@...t.edu.cn>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Jaehoon Chung <jh80.chung@...sung.com>
Cc:     Dongliang Mu <mudongliangabcd@...il.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: qualcomm: call clk_disable_unprepare in the error
 handling

On 14/09/2022 07:13, Dongliang Mu wrote:
> From: Dongliang Mu <mudongliangabcd@...il.com>
> 
> Smatch reports the following error:
> 
> drivers/phy/qualcomm/phy-qcom-usb-hsic.c:82 qcom_usb_hsic_phy_power_on()
> warn: 'uphy->cal_clk' from clk_prepare_enable() not released on lines:
> 58.
> drivers/phy/qualcomm/phy-qcom-usb-hsic.c:82 qcom_usb_hsic_phy_power_on()
> warn: 'uphy->cal_sleep_clk' from clk_prepare_enable() not released on
> lines: 58.
> drivers/phy/qualcomm/phy-qcom-usb-hsic.c:82 qcom_usb_hsic_phy_power_on()
> warn: 'uphy->phy_clk' from clk_prepare_enable() not released on lines:
> 58.
> 
> Fix this by calling proper clk_disable_unprepare calls.
> 
> Fixes: 0b56e9a7e835 ("phy: Group vendor specific phy drivers")
> Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
> ---
>   drivers/phy/qualcomm/phy-qcom-usb-hsic.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-usb-hsic.c b/drivers/phy/qualcomm/phy-qcom-usb-hsic.c
> index 716a77748ed8..20f6dd37c7c1 100644
> --- a/drivers/phy/qualcomm/phy-qcom-usb-hsic.c
> +++ b/drivers/phy/qualcomm/phy-qcom-usb-hsic.c
> @@ -54,8 +54,10 @@ static int qcom_usb_hsic_phy_power_on(struct phy *phy)
>   
>   	/* Configure pins for HSIC functionality */
>   	pins_default = pinctrl_lookup_state(uphy->pctl, PINCTRL_STATE_DEFAULT);
> -	if (IS_ERR(pins_default))
> -		return PTR_ERR(pins_default);
> +	if (IS_ERR(pins_default)) {
> +		ret = PTR_ERR(pins_default);
> +		goto err_ulpi;
> +	}
>   
>   	ret = pinctrl_select_state(uphy->pctl, pins_default);
>   	if (ret)

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>