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

Mauro Carvalho Chehab
2019-10-11T11:20:21Z

Em Thu, 10 Oct 2019 20:25:38 +0000
Robert Richter <rrichter@marvell.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@arm.com>
> Signed-off-by: Robert Richter <rrichter@marvell.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.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