netdev - [PATCH net-next 06/11] mlxsw: spectrum_router: Avoid allocating NH counters twice

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Message-ID: <0cc9050e196366c1387ab5ee47f1cee8ecde9c86.1709901020.git.petrm@nvidia.com>
Date: Fri, 8 Mar 2024 13:59:50 +0100
From: Petr Machata <petrm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>, "David
 Ahern" <dsahern@...nel.org>, Shuah Khan <shuah@...nel.org>,
	<mlxsw@...dia.com>
Subject: [PATCH net-next 06/11] mlxsw: spectrum_router: Avoid allocating NH counters twice

mlxsw_sp_nexthop_counter_disable() decays to a nop when called on a
disabled counter, but mlxsw_sp_nexthop_counter_enable() can't similarly
be called on an enabled counter. This would be useful in the following
patches. Add the missing condition.

Signed-off-by: Petr Machata <petrm@...dia.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 2df95b5a444f..a724484614ab 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -3157,6 +3157,9 @@ int mlxsw_sp_nexthop_counter_enable(struct mlxsw_sp *mlxsw_sp,
 	struct devlink *devlink;
 	int err;
 
+	if (nh->counter_valid)
+		return 0;
+
 	devlink = priv_to_devlink(mlxsw_sp->core);
 	if (!devlink_dpipe_table_counter_enabled(devlink,
 						 MLXSW_SP_DPIPE_TABLE_NAME_ADJ))
-- 
2.43.0