From: Seungwon Jeon <tgih.jun@samsung.com>
To: "'Doug Anderson'" <dianders@chromium.org>,
        "'Jaehoon Chung'" <jh80.chung@samsung.com>
Cc: yuvaraj.cd@samsung.com, "'Alim Akhtar'" <alim.akhtar@samsung.com>,
        "'Sonny Rao'" <sonnyrao@chromium.org>,
        linux-samsung-soc@vger.kernel.org, chris@printf.net,
        ulf.hansson@linaro.org, linux-mmc@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1398210681-22976-1-git-send-email-dianders@chromium.org>
In-reply-to: <1398210681-22976-1-git-send-email-dianders@chromium.org>
Subject: RE: [PATCH] mmc: dw_mmc: Don't print data errors
Date: Wed, 23 Apr 2014 15:22:44 +0900
Message-id: <000201cf5ebc$70213200$50639600$%jun@samsung.com>
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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@chromium.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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