Re: [PATCH v3 05/10] EDAC/mc: Create new function edac_inc_csrow()

Borislav Petkov
2020-02-13T12:47:19Z

On Thu, Jan 23, 2020 at 09:02:58AM +0000, Robert Richter wrote:
> Have a separate function to count errors in csrow/channel. This better
> separates code and reduces the indentation level. No functional
> changes.
>
> Signed-off-by: Robert Richter <rrichter@marvell.com>
> Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
> Acked-by: Aristeu Rozanski <aris@redhat.com>
> ---
> drivers/edac/edac_mc.c | 40 +++++++++++++++++++++++++---------------
> 1 file changed, 25 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
> index 3c00c046acc9..e75cb7a9c454 100644
> --- a/drivers/edac/edac_mc.c
> +++ b/drivers/edac/edac_mc.c
> @@ -1091,6 +1091,26 @@ static void edac_ue_error(struct mem_ctl_info *mci,
> edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count);
> }
>
> +static void edac_inc_csrow(struct edac_raw_error_desc *e, int row, int chan)
> +{
> + struct mem_ctl_info *mci = error_desc_to_mci(e);
> + u16 count = e->error_count;
> + enum hw_event_mc_err_type type = e->type;

Please sort function local variables declaration in a reverse christmas
tree order:

<type A> longest_variable_name;
<type B> shorter_var_name;
<type C> even_shorter;
<type D> i;

> +
> + if (row < 0)
> + return;
> +
> + edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> +
> + if (type == HW_EVENT_ERR_CORRECTED) {
> + mci->csrows[row]->ce_count += count;
> + if (chan >= 0)
> + mci->csrows[row]->channels[chan]->ce_count += count;
> + } else {
> + mci->csrows[row]->ue_count += count;
> + }
> +}
> +
> void edac_raw_mc_handle_error(struct edac_raw_error_desc *e)
> {
> struct mem_ctl_info *mci = error_desc_to_mci(e);
> @@ -1258,22 +1278,12 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
> chan = -2;
> }
>
> - if (!e->enable_per_layer_report) {
> + if (!e->enable_per_layer_report)
> strcpy(e->label, "any memory");
> - } else {
> - edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> - if (p == e->label)
> - strcpy(e->label, "unknown memory");
> - if (type == HW_EVENT_ERR_CORRECTED) {
> - if (row >= 0) {
> - mci->csrows[row]->ce_count += error_count;
> - if (chan >= 0)
> - mci->csrows[row]->channels[chan]->ce_count += error_count;
> - }
> - } else
> - if (row >= 0)
> - mci->csrows[row]->ue_count += error_count;
> - }
> + else if (!*e->label)
> + strcpy(e->label, "unknown memory");
> +
> + edac_inc_csrow(e, row, chan);

Err, but this has functional changes: the !e->enable_per_layer_report
case sets only the e->label and the else branch only does increment
->ce_count.

Your change gets ->ce_count incremented in both cases.

Why?

--
Regards/Gruss,
Boris.