linux-kernel - Re: [PATCH 2/3] EDAC: synopsys: Reorganizing the output message for CE/UE

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Date:   Wed, 26 Feb 2020 17:49:28 +0000
From:   James Morse <james.morse@....com>
To:     Sherry Sun <sherry.sun@....com>
Cc:     bp@...en8.de, mchehab@...nel.org, tony.luck@...el.com,
        rrichter@...vell.com, michal.simek@...inx.com,
        linux-edac@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-imx@....com, frank.li@....com
Subject: Re: [PATCH 2/3] EDAC: synopsys: Reorganizing the output message for
 CE/UE

Hi Sherry,

On 24/02/2020 09:42, Sherry Sun wrote:
> The origin way which call sprintf() function two or three times to

(original? 'The current way' may be better)


> output message for CE/UE is incorrect, because it won't output all the
> message needed, instead it will only output the last message in
> sprintf().

Nice!


> So the simplest and most effective way to fix this problem
> is reorganizing all the output message needed for CE/UE into one
> sprintf() function.

This is a bug, but its in the middle of a series doing some cleanup, meaning the
maintainer can't easily pick it up in isolation. Could you post it separately?

'Reorganize' in the subject makes this sound like cleanup. Would "EDAC: synopsys: Fix back
to back snprintf() messages for CE/UE" be better?


Please add:
Fixes: b500b4a029d57 ("EDAC, synopsys: Add ECC support for ZynqMP DDR controller")

in the signed-off-by area so that stable trees pick this up.

and for what its worth:
Reviewed-by: James Morse <james.morse@....com>


Thanks!

James



> diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
> index 7046b8929522..ef7e907c7956 100644
> --- a/drivers/edac/synopsys_edac.c
> +++ b/drivers/edac/synopsys_edac.c
> @@ -485,20 +485,14 @@ static void handle_error(struct mem_ctl_info *mci, struct synps_ecc_status *p)
>  		pinf = &p->ceinfo;
>  		if (!priv->p_data->quirks) {
>  			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "DDR ECC error type:%s Row %d Bank %d Col %d ",
> -				  "CE", pinf->row, pinf->bank, pinf->col);
> -			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "Bit Position: %d Data: 0x%08x\n",
> +				 "DDR ECC error type:%s Row %d Bank %d Col %d Bit Position: %d Data: 0x%08x",
> +				 "CE", pinf->row, pinf->bank, pinf->col,
>  				 pinf->bitpos, pinf->data);
>  		} else {
>  			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "DDR ECC error type:%s Row %d Bank %d ",
> -				  "CE", pinf->row, pinf->bank);
> -			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "BankGroup Number %d Block Number %d ",
> -				 pinf->bankgrpnr, pinf->blknr);
> -			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "Bit Position: %d Data: 0x%08x\n",
> +				 "DDR ECC error type:%s Row %d Bank %d BankGroup Number %d Block Number %d Bit Position: %d Data: 0x%08x",
> +				 "CE", pinf->row, pinf->bank,
> +				 pinf->bankgrpnr, pinf->blknr,
>  				 pinf->bitpos, pinf->data);
>  		}
>  
> @@ -515,10 +509,8 @@ static void handle_error(struct mem_ctl_info *mci, struct synps_ecc_status *p)
>  				"UE", pinf->row, pinf->bank, pinf->col);
>  		} else {
>  			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "DDR ECC error type :%s Row %d Bank %d ",
> -				 "UE", pinf->row, pinf->bank);
> -			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> -				 "BankGroup Number %d Block Number %d",
> +				 "DDR ECC error type :%s Row %d Bank %d BankGroup Number %d Block Number %d",
> +				 "UE", pinf->row, pinf->bank,
>  				 pinf->bankgrpnr, pinf->blknr);
>  		}
>  
>