netdev - [PATCH net-next 16/16] mlxsw: spectrum: Generalize split count check

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Message-Id: <20191031094221.17526-17-idosch@idosch.org>
Date:   Thu, 31 Oct 2019 11:42:21 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, mlxsw@...lanox.com,
        Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 16/16] mlxsw: spectrum: Generalize split count check

From: Jiri Pirko <jiri@...lanox.com>

Make the check generic for any possible value, not only 2 and 4.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
Reviewed-by: Shalom Toledo <shalomt@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 3ce48d0df37f..ea4cc2aa99e0 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -4215,9 +4215,9 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 		return -EINVAL;
 	}
 
-	if (count != 2 && count != 4) {
-		netdev_err(mlxsw_sp_port->dev, "Port can only be split into 2 or 4 ports\n");
-		NL_SET_ERR_MSG_MOD(extack, "Port can only be split into 2 or 4 ports");
+	if (count == 1 || !is_power_of_2(count) || count > max_width) {
+		netdev_err(mlxsw_sp_port->dev, "Invalid split count\n");
+		NL_SET_ERR_MSG_MOD(extack, "Invalid split count");
 		return -EINVAL;
 	}
 
-- 
2.21.0