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Message-ID: <0a21f8e8-f4a6-4311-ab35-a02a1a593629@linaro.org>
Date: Thu, 4 Apr 2024 09:20:26 +0200
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Subject: Re: [PATCH v2 3/6] usb: ohci-exynos: Use devm_clk_get_enabled()
 helpers
To: Anand Moon <linux.amoon@gmail.com>, Alan Stern
 <stern@rowland.harvard.edu>, Greg Kroah-Hartman
 <gregkh@linuxfoundation.org>, Alim Akhtar <alim.akhtar@samsung.com>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
 Johan Hovold <johan@kernel.org>, linux-usb@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org,
 linux-kernel@vger.kernel.org
References: <20240404071350.4242-1-linux.amoon@gmail.com>
 <20240404071350.4242-4-linux.amoon@gmail.com>
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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <20240404071350.4242-4-linux.amoon@gmail.com>
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On 04/04/2024 09:13, Anand Moon wrote:
> The devm_clk_get_enabled() helpers:
>     - call devm_clk_get()
>     - call clk_prepare_enable() and register what is needed in order to
>       call clk_disable_unprepare() when needed, as a managed resource.
> 
> This simplifies the code and avoids the calls to clk_disable_unprepare().
> 
> While at it, use dev_err_probe consistently, and use its return value
> to return the error code.
> 
> Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> ---
> v2: new changes in this series.
> ---
>  drivers/usb/host/ohci-exynos.c | 19 +++++--------------
>  1 file changed, 5 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index 20e26a474591..85d04ae0ae40 100644
> --- a/drivers/usb/host/ohci-exynos.c
> +++ b/drivers/usb/host/ohci-exynos.c
> @@ -135,20 +135,15 @@ static int exynos_ohci_probe(struct platform_device *pdev)
>  
>  	err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);
>  	if (err)
> -		goto fail_clk;
> -
> -	exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
> +		goto fail_io;
>  
> +	exynos_ohci->clk = devm_clk_get_enabled(&pdev->dev, "usbhost");
>  	if (IS_ERR(exynos_ohci->clk)) {
> -		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
> -		err = PTR_ERR(exynos_ohci->clk);
> -		goto fail_clk;
> +		usb_put_hcd(hcd);
> +		return dev_err_probe(&pdev->dev, PTR_ERR(exynos_ohci->clk),
> +				"Failed to get usbhost clock\n");

Why do you introduce entirely parallel exit paths? There is already
single error handling part with labels. Use that.


Best regards,
Krzysztof