[PATCH 6.6.y 1/5] vxlan: Do not alloc tstats manually

[Sasha Levin <sashal@kernel.org>]

From: Breno Leitao <leitao@debian.org>

[ Upstream commit e28c5efc31397af17bc5a7d55b963f59bcde0166 ]

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 in 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.

Remove the allocation in the vxlan driver and leverage the network
core allocation instead.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/20240311112437.3813987-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: b9553558b48d ("vxlan: use pskb_network_may_pull() for transmit path header pulls")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/vxlan/vxlan_core.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 0e9aeb03fcc73..752015accf586 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2990,15 +2990,9 @@ static int vxlan_init(struct net_device *dev)
 			return err;
 	}
 
-	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
-	if (!dev->tstats) {
-		err = -ENOMEM;
-		goto err_vnigroup_uninit;
-	}
-
 	err = gro_cells_init(&vxlan->gro_cells, dev);
 	if (err)
-		goto err_free_percpu;
+		goto err_vnigroup_uninit;
 
 	err = vxlan_mdb_init(vxlan);
 	if (err)
@@ -3009,8 +3003,6 @@ static int vxlan_init(struct net_device *dev)
 
 err_gro_cells_destroy:
 	gro_cells_destroy(&vxlan->gro_cells);
-err_free_percpu:
-	free_percpu(dev->tstats);
 err_vnigroup_uninit:
 	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
 		vxlan_vnigroup_uninit(vxlan);
@@ -3041,8 +3033,6 @@ static void vxlan_uninit(struct net_device *dev)
 	gro_cells_destroy(&vxlan->gro_cells);
 
 	vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
-
-	free_percpu(dev->tstats);
 }
 
 /* Start ageing timer and join group when device is brought up */
@@ -3269,6 +3259,7 @@ static void vxlan_setup(struct net_device *dev)
 	dev->min_mtu = ETH_MIN_MTU;
 	dev->max_mtu = ETH_MAX_MTU;
 
+	dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
 	INIT_LIST_HEAD(&vxlan->next);
 
 	timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);
-- 
2.53.0