linux-kernel - Re: [PATCH 17/19] EDAC, ghes: Remove intermediate buffer pvt->detail

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Date:   Fri, 11 Oct 2019 08:20:11 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Robert Richter <rrichter@...vell.com>
Cc:     Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>,
        James Morse <james.morse@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/19] EDAC, ghes: Remove intermediate buffer
 pvt->detail_location

Em Thu, 10 Oct 2019 20:25:38 +0000
Robert Richter <rrichter@...vell.com> escreveu:

> detail_location[] is used to collect two location strings so they can
> be passed as one to trace_mc_event(). Instead of having an extra copy
> step, assemble the location string in other_detail[] from the
> beginning.
> 
> Using other_detail[] to call trace_mc_event() is now the same as in
> edac_mc.c and code can be unified.
> 
> Reviewed-by: James Morse <james.morse@....com>
> Signed-off-by: Robert Richter <rrichter@...vell.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

> ---
>  drivers/edac/ghes_edac.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
> index 97242cf18a88..8d9d3c4dbebb 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];
>  };
>  
> @@ -356,6 +355,8 @@ 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;
>  
> @@ -436,12 +437,10 @@ 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(e->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);
>  
>  	dimm = edac_get_dimm_by_index(mci, e->top_layer);
>  



Thanks,
Mauro