netdev - [PATCH net-next 02/13] bnxt_en: Adjust timer based on ethtool stats-block-usecs settings.

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Date:   Sun,  5 Aug 2018 16:51:47 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org
Subject: [PATCH net-next 02/13] bnxt_en: Adjust timer based on ethtool stats-block-usecs settings.

The driver gathers statistics using 2 mechanisms.  Some stats are DMA'ed
directly from hardware and others are polled from the driver's timer.
Currently, we only adjust the DMA frequency based on the ethtool
stats-block-usecs setting.  This patch adjusts the driver's timer
frequency as well to make everything consistent.

Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 3d40e49..1f626af 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -112,6 +112,11 @@ static int bnxt_set_coalesce(struct net_device *dev,
 					      BNXT_MAX_STATS_COAL_TICKS);
 		stats_ticks = rounddown(stats_ticks, BNXT_MIN_STATS_COAL_TICKS);
 		bp->stats_coal_ticks = stats_ticks;
+		if (bp->stats_coal_ticks)
+			bp->current_interval =
+				bp->stats_coal_ticks * HZ / 1000000;
+		else
+			bp->current_interval = BNXT_TIMER_INTERVAL;
 		update_stats = true;
 	}

-- 
2.5.1