linux-kernel - RE: [PATCH] mmc: dw_mmc: Don't print data errors

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Date:	Wed, 23 Apr 2014 15:22:44 +0900
From:	Seungwon Jeon <tgih.jun@...sung.com>
To:	'Doug Anderson' <dianders@...omium.org>,
	'Jaehoon Chung' <jh80.chung@...sung.com>
Cc:	yuvaraj.cd@...sung.com, 'Alim Akhtar' <alim.akhtar@...sung.com>,
	'Sonny Rao' <sonnyrao@...omium.org>,
	linux-samsung-soc@...r.kernel.org, chris@...ntf.net,
	ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: RE: [PATCH] mmc: dw_mmc: Don't print data errors

On Wed, April 23, 2014, Doug Anderson wrote:
> Data errors are completely expected during tuning.  Printing them out
> is confusing people looking at the kernel logs.  They see things like:
> 
>  [    3.613296] dwmmc_exynos 12200000.dwmmc0: data error, status 0x00000088
> 
> ...and they think something is wrong with their hardware.
> 
> Remove the printouts.  We'll leave it up to a higher level to report
> about errors.
Yes, your saying makes sense.
But in normal I/O, actual error information such as status below is useful, isn't it?

Thanks,
Seungwon Jeon

> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> ---
>  drivers/mmc/host/dw_mmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index cced599..4c8d423 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -1248,7 +1248,7 @@ static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data)
>  			data->error = -EIO;
>  		}
> 
> -		dev_err(host->dev, "data error, status 0x%08x\n", status);
> +		dev_dbg(host->dev, "data error, status 0x%08x\n", status);
> 
>  		/*
>  		 * After an error, there may be data lingering
> --
> 1.9.1.423.g4596e3a
> 
> --
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