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From: Breno Leitao <leitao@debian.org>
To: Taehee Yoo <ap420073@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	horms@kernel.org,
	dsahern@kernel.org
Subject: [PATCH net-next 1/2] net: amt: Move stats allocation to core
Date: Fri,  8 Mar 2024 08:26:04 -0800
Message-ID: <20240308162606.1597287-1-leitao@debian.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and
convert veth & vrf"), stats allocation could be done on net core instead
of this driver.

With this new approach, the driver doesn't have to bother with error
handling (allocation failure checking, making sure free happens in the
right spot, etc). This is core responsibility now.

Move amt driver to leverage the core allocation.

Signed-off-by: Breno Leitao <leitao@debian.org>
---
 drivers/net/amt.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/amt.c b/drivers/net/amt.c
index 68e79b1272f6..cb31d1990660 100644
--- a/drivers/net/amt.c
+++ b/drivers/net/amt.c
@@ -3063,15 +3063,10 @@ static int amt_dev_init(struct net_device *dev)
 	int err;
 
 	amt->dev = dev;
-	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
-	if (!dev->tstats)
-		return -ENOMEM;
 
 	err = gro_cells_init(&amt->gro_cells, dev);
-	if (err) {
-		free_percpu(dev->tstats);
+	if (err)
 		return err;
-	}
 
 	return 0;
 }
@@ -3081,7 +3076,6 @@ static void amt_dev_uninit(struct net_device *dev)
 	struct amt_dev *amt = netdev_priv(dev);
 
 	gro_cells_destroy(&amt->gro_cells);
-	free_percpu(dev->tstats);
 }
 
 static const struct net_device_ops amt_netdev_ops = {
@@ -3111,6 +3105,7 @@ static void amt_link_setup(struct net_device *dev)
 	dev->hw_features	|= NETIF_F_SG | NETIF_F_HW_CSUM;
 	dev->hw_features	|= NETIF_F_FRAGLIST | NETIF_F_RXCSUM;
 	dev->hw_features	|= NETIF_F_GSO_SOFTWARE;
+	dev->pcpu_stat_type	= NETDEV_PCPU_STAT_TSTATS;
 	eth_hw_addr_random(dev);
 	eth_zero_addr(dev->broadcast);
 	ether_setup(dev);
-- 
2.43.0