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bnxt_en: Allow the user to set ethtool stats-block-usecs to 0. 

For debugging purpose, it is sometimes useful to disable periodic
port statistics updates, so that the firmware logs will not be
filled with statistics update messages.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2017-07-24 12:34:24 -04:00 committed by David S. Miller
parent 5c8227d0d3
commit adcc331e42
2 changed files with 7 additions and 4 deletions
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3
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -6843,7 +6843,8 @@ static void bnxt_timer(unsigned long data)
if (atomic_read(&bp->intr_sem) != 0)
goto bnxt_restart_timer;
if (bp->link_info.link_up && (bp->flags & BNXT_FLAG_PORT_STATS)) {
if (bp->link_info.link_up && (bp->flags & BNXT_FLAG_PORT_STATS) &&
bp->stats_coal_ticks) {
set_bit(BNXT_PERIODIC_STATS_SP_EVENT, &bp->sp_event);
schedule_work(&bp->sp_task);
}

8
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -86,9 +86,11 @@ static int bnxt_set_coalesce(struct net_device *dev,
if (bp->stats_coal_ticks != coal->stats_block_coalesce_usecs) {
u32 stats_ticks = coal->stats_block_coalesce_usecs;
stats_ticks = clamp_t(u32, stats_ticks,
BNXT_MIN_STATS_COAL_TICKS,
BNXT_MAX_STATS_COAL_TICKS);
/* Allow 0, which means disable. */
if (stats_ticks)
stats_ticks = clamp_t(u32, stats_ticks,
BNXT_MIN_STATS_COAL_TICKS,
BNXT_MAX_STATS_COAL_TICKS);
stats_ticks = rounddown(stats_ticks, BNXT_MIN_STATS_COAL_TICKS);
bp->stats_coal_ticks = stats_ticks;
update_stats = true;