netdev - [PATCH v4 net-next 12/15] net: aquantia: fetch up to date statistics on ethtool request

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Message-ID: <9b824b0e582e7670a1226f16df70c76acbf86b8c.1556531633.git.igor.russkikh@aquantia.com>
Date:   Mon, 29 Apr 2019 10:05:02 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     "David S . Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Nikita Danilov <Nikita.Danilov@...antia.com>,
        Dmitry Bogdanov <Dmitry.Bogdanov@...antia.com>,
        Igor Russkikh <Igor.Russkikh@...antia.com>
Subject: [PATCH v4 net-next 12/15] net: aquantia: fetch up to date statistics
 on ethtool request

From: Dmitry Bogdanov <dmitry.bogdanov@...antia.com>

This improves ethtool -S usage, where stats are now actual
on each request. Before that stats only were updated at service
timer period.

Tested-by: Nikita Danilov <ndanilov@...antia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@...antia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 454a44bb148e..8018f483ae45 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -700,7 +700,14 @@ void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 	unsigned int i = 0U;
 	unsigned int count = 0U;
 	struct aq_vec_s *aq_vec = NULL;
-	struct aq_stats_s *stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
+	struct aq_stats_s *stats;
+
+	if (self->aq_fw_ops->update_stats) {
+		mutex_lock(&self->fwreq_mutex);
+		self->aq_fw_ops->update_stats(self->aq_hw);
+		mutex_unlock(&self->fwreq_mutex);
+	}
+	stats = self->aq_hw_ops->hw_get_hw_stats(self->aq_hw);
 
 	if (!stats)
 		goto err_exit;
-- 
2.17.1