linux-kernel - Re: [PATCH v2 03/24] EDAC, ghes: Remove pvt->detail

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Message-ID: <abbab8fd-d87e-d37d-b077-9f43474beaf8@arm.com>
Date:   Fri, 2 Aug 2019 18:04:46 +0100
From:   James Morse <james.morse@....com>
To:     Robert Richter <rrichter@...vell.com>
Cc:     Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 03/24] EDAC, ghes: Remove pvt->detail_location string

Hi Robert,

On 24/06/2019 16:08, Robert Richter wrote:
> The detail_location[] string in struct ghes_edac_pvt is complete
> useless and data is just copied around. Put everything into
> e->other_detail from the beginning.
> 
> Signed-off-by: Robert Richter <rrichter@...vell.com>
> ---


> diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
> index d095d98d6a8d..049de73c3bad 100644
> --- a/drivers/edac/ghes_edac.c
> +++ b/drivers/edac/ghes_edac.c
> @@ -21,8 +21,7 @@ struct ghes_edac_pvt {
>  	struct mem_ctl_info *mci;
>  
>  	/* Buffers for the error handling routine */
> -	char detail_location[240];
> -	char other_detail[160];
> +	char other_detail[400];
>  	char msg[80];
>  };
>  
> @@ -224,13 +223,14 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
>  	e->error_count = 1;
>  	e->grain = 1;
>  	strcpy(e->label, "unknown label");
> -	e->msg = pvt->msg;
> -	e->other_detail = pvt->other_detail;
>  	e->top_layer = -1;
>  	e->mid_layer = -1;
>  	e->low_layer = -1;
> -	*pvt->other_detail = '\0';
> +	e->msg = pvt->msg;
> +	e->other_detail = pvt->other_detail;
> +
>  	*pvt->msg = '\0';
> +	*pvt->other_detail = '\0';
>  
>  	switch (sev) {
>  	case GHES_SEV_CORRECTED:
> @@ -361,6 +361,8 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
>  
>  	/* All other fields are mapped on e->other_detail */
>  	p = pvt->other_detail;
> +	p += snprintf(p, sizeof(pvt->other_detail),
> +		"APEI location: %s ", e->location);
>  	if (mem_err->validation_bits & CPER_MEM_VALID_ERROR_STATUS) {
>  		u64 status = mem_err->error_status;
>  
> @@ -443,12 +445,10 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
>  	grain_bits = fls_long(e->grain - 1);
>  
>  	/* Generate the trace event */
> -	snprintf(pvt->detail_location, sizeof(pvt->detail_location),
> -		 "APEI location: %s %s", e->location, e->other_detail);
>  	trace_mc_event(type, e->msg, e->label, e->error_count,
>  		       mci->mc_idx, e->top_layer, e->mid_layer, e->low_layer,
>  		       (e->page_frame_number << PAGE_SHIFT) | e->offset_in_page,
> -		       grain_bits, e->syndrome, pvt->detail_location);
> +		       grain_bits, e->syndrome, e->other_detail);
>  
>  	edac_raw_mc_handle_error(type, mci, e);
>  	spin_unlock_irqrestore(&ghes_lock, flags);

After a game of spot-the-difference: you added a newline.
Reviewed-by: James Morse <james.morse@....com>

Previously here:
https://lore.kernel.org/linux-edac/7017c91e-8923-c8d2-26ca-875328ab855a@arm.com/

Please pick up tags when posting a new version.


Thanks,

James