linux-kernel - Re: [PATCH] mmc: sdhci-*: Don't emit error msg if sdhci_add

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Date:   Fri, 25 May 2018 12:05:58 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Ben Dooks <ben-linux@...ff.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Patrice Chotard <patrice.chotard@...com>
Cc:     bcm-kernel-feedback-list@...adcom.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] mmc: sdhci-*: Don't emit error msg if sdhci_add_host()
 fails

On 25/05/18 10:15, Jisheng Zhang wrote:
> I noticed below error msg with sdhci-pxav3 on some berlin platforms:
> 
> [.....] sdhci-pxav3 f7ab0000.sdhci failed to add host
> 
> It is due to getting related vmmc or vqmmc regulator returns
> -EPROBE_DEFER. It doesn't matter at all but it's confusing.
> 
>>>From another side, if driver probing fails and the error number isn't
> -EPROBE_DEFER, the core will tell us something as below:
> 
> [.....] sdhci-pxav3: probe of f7ab0000.sdhci failed with error -EXX
> 
> So it's not necessary to emit error msg if sdhci_add_host() fails. And
> some other sdhci host drivers also have this issue, let's fix them
> together.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/sdhci-bcm-kona.c | 4 +---
>  drivers/mmc/host/sdhci-pic32.c    | 4 +---
>  drivers/mmc/host/sdhci-pxav2.c    | 4 +---
>  drivers/mmc/host/sdhci-pxav3.c    | 4 +---
>  drivers/mmc/host/sdhci-s3c.c      | 4 +---
>  drivers/mmc/host/sdhci-spear.c    | 4 +---
>  drivers/mmc/host/sdhci-st.c       | 4 +---
>  7 files changed, 7 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c
> index 11ca95c60bcf..bdbd4897c0f7 100644
> --- a/drivers/mmc/host/sdhci-bcm-kona.c
> +++ b/drivers/mmc/host/sdhci-bcm-kona.c
> @@ -284,10 +284,8 @@ static int sdhci_bcm_kona_probe(struct platform_device *pdev)
>  	sdhci_bcm_kona_sd_init(host);
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(dev, "Failed sdhci_add_host\n");
> +	if (ret)
>  		goto err_reset;
> -	}
>  
>  	/* if device is eMMC, emulate card insert right here */
>  	if (!mmc_card_is_removable(host->mmc)) {
> diff --git a/drivers/mmc/host/sdhci-pic32.c b/drivers/mmc/host/sdhci-pic32.c
> index a6caa49ca25a..a11e6397d4ff 100644
> --- a/drivers/mmc/host/sdhci-pic32.c
> +++ b/drivers/mmc/host/sdhci-pic32.c
> @@ -200,10 +200,8 @@ static int pic32_sdhci_probe(struct platform_device *pdev)
>  	}
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(&pdev->dev, "error adding host\n");
> +	if (ret)
>  		goto err_base_clk;
> -	}
>  
>  	dev_info(&pdev->dev, "Successfully added sdhci host\n");
>  	return 0;
> diff --git a/drivers/mmc/host/sdhci-pxav2.c b/drivers/mmc/host/sdhci-pxav2.c
> index 8986f9d9cf98..2c3827f54927 100644
> --- a/drivers/mmc/host/sdhci-pxav2.c
> +++ b/drivers/mmc/host/sdhci-pxav2.c
> @@ -221,10 +221,8 @@ static int sdhci_pxav2_probe(struct platform_device *pdev)
>  	host->ops = &pxav2_sdhci_ops;
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to add host\n");
> +	if (ret)
>  		goto disable_clk;
> -	}
>  
>  	return 0;
>  
> diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
> index a34434166ca7..b8e96f392428 100644
> --- a/drivers/mmc/host/sdhci-pxav3.c
> +++ b/drivers/mmc/host/sdhci-pxav3.c
> @@ -472,10 +472,8 @@ static int sdhci_pxav3_probe(struct platform_device *pdev)
>  	pm_suspend_ignore_children(&pdev->dev, 1);
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to add host\n");
> +	if (ret)
>  		goto err_add_host;
> -	}
>  
>  	if (host->mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ)
>  		device_init_wakeup(&pdev->dev, 1);
> diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
> index cda83ccb2702..9ef89d00970e 100644
> --- a/drivers/mmc/host/sdhci-s3c.c
> +++ b/drivers/mmc/host/sdhci-s3c.c
> @@ -655,10 +655,8 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
>  		goto err_req_regs;
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(dev, "sdhci_add_host() failed\n");
> +	if (ret)
>  		goto err_req_regs;
> -	}
>  
>  #ifdef CONFIG_PM
>  	if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
> diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
> index 14511526a3a8..9247d51f2eed 100644
> --- a/drivers/mmc/host/sdhci-spear.c
> +++ b/drivers/mmc/host/sdhci-spear.c
> @@ -126,10 +126,8 @@ static int sdhci_probe(struct platform_device *pdev)
>  	}
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_dbg(&pdev->dev, "error adding host\n");
> +	if (ret)
>  		goto disable_clk;
> -	}
>  
>  	platform_set_drvdata(pdev, host);
>  
> diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c
> index c32daed0d418..8f95647195d9 100644
> --- a/drivers/mmc/host/sdhci-st.c
> +++ b/drivers/mmc/host/sdhci-st.c
> @@ -422,10 +422,8 @@ static int sdhci_st_probe(struct platform_device *pdev)
>  	st_mmcss_cconfig(np, host);
>  
>  	ret = sdhci_add_host(host);
> -	if (ret) {
> -		dev_err(&pdev->dev, "Failed sdhci_add_host\n");
> +	if (ret)
>  		goto err_out;
> -	}
>  
>  	host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION));
>  
>