linux-kernel - Re: [PATCH RESEND v2 1/2] bus: bt1-apb: Don't print error on -EPROBE

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Message-ID: <20220624211227.667ejjix3gboj6mt@mobilestation>
Date:   Sat, 25 Jun 2022 00:12:27 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        soc@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v2 1/2] bus: bt1-apb: Don't print error on
 -EPROBE_DEFER

Oops, wrong version ID. I'll resend it.

-Sergey

On Sat, Jun 25, 2022 at 12:10:13AM +0300, Serge Semin wrote:
> The Baikal-T1 APB bus driver correctly handles the deferred probe
> situation, but still pollutes the system log with a misleading error
> message. Let's fix that by using the dev_err_probe() method to print the
> log message in case of the clocks/resets request errors.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> 
> ---
> 
> Link: https://lore.kernel.org/lkml/20220610080103.10689-1-Sergey.Semin@baikalelectronics.ru/
> Changelog v2:
> - Use the dev_err_probe() return value as the return status of the
>   corresponding method. (@Philipp)
> 
> Link: https://lore.kernel.org/lkml/20220610104030.28399-1-Sergey.Semin@baikalelectronics.ru
> Changelog v3:
> - Just resend.
> - Rebase onto the kernel v5.19-rcX.
> ---
>  drivers/bus/bt1-apb.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/bus/bt1-apb.c b/drivers/bus/bt1-apb.c
> index b25ff941e7c7..63b1b4a76671 100644
> --- a/drivers/bus/bt1-apb.c
> +++ b/drivers/bus/bt1-apb.c
> @@ -175,10 +175,9 @@ static int bt1_apb_request_rst(struct bt1_apb *apb)
>  	int ret;
>  
>  	apb->prst = devm_reset_control_get_optional_exclusive(apb->dev, "prst");
> -	if (IS_ERR(apb->prst)) {
> -		dev_warn(apb->dev, "Couldn't get reset control line\n");
> -		return PTR_ERR(apb->prst);
> -	}
> +	if (IS_ERR(apb->prst))
> +		return dev_err_probe(apb->dev, PTR_ERR(apb->prst),
> +				     "Couldn't get reset control line\n");
>  
>  	ret = reset_control_deassert(apb->prst);
>  	if (ret)
> @@ -199,10 +198,9 @@ static int bt1_apb_request_clk(struct bt1_apb *apb)
>  	int ret;
>  
>  	apb->pclk = devm_clk_get(apb->dev, "pclk");
> -	if (IS_ERR(apb->pclk)) {
> -		dev_err(apb->dev, "Couldn't get APB clock descriptor\n");
> -		return PTR_ERR(apb->pclk);
> -	}
> +	if (IS_ERR(apb->pclk))
> +		return dev_err_probe(apb->dev, PTR_ERR(apb->pclk),
> +				     "Couldn't get APB clock descriptor\n");
>  
>  	ret = clk_prepare_enable(apb->pclk);
>  	if (ret) {
> -- 
> 2.35.1
>