netdev - [PATCH net-next 6/6] mlxsw: spectrum_router: Avoid uninitialized symbol errors

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Message-Id: <20200327085525.1906170-7-idosch@idosch.org>
Date:   Fri, 27 Mar 2020 11:55:25 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, kuba@...nel.org,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 6/6] mlxsw: spectrum_router: Avoid uninitialized symbol errors

From: Ido Schimmel <idosch@...lanox.com>

Suppress the following smatch errors. None of these are actually
possible with current code paths.

drivers/net/ethernet/mellanox/mlxsw//spectrum_router.c:1220
mlxsw_sp_ipip_entry_find_decap() error: uninitialized symbol 'saddrp'.
drivers/net/ethernet/mellanox/mlxsw//spectrum_router.c:1220
mlxsw_sp_ipip_entry_find_decap() error: uninitialized symbol
'saddr_len'.
drivers/net/ethernet/mellanox/mlxsw//spectrum_router.c:1221
mlxsw_sp_ipip_entry_find_decap() error: uninitialized symbol
'saddr_prefix_len'.

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:1390
mlxsw_sp_netdevice_ipip_ol_reg_event() error: uninitialized symbol
'ipipt'.

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3255
mlxsw_sp_nexthop_group_update() error: uninitialized symbol 'err'.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 97b7e6ebd9fa..d5bca1be3ef5 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -1212,7 +1212,7 @@ mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp,
 		saddr_len = 4;
 		saddr_prefix_len = 32;
 		break;
-	case MLXSW_SP_L3_PROTO_IPV6:
+	default:
 		WARN_ON(1);
 		return NULL;
 	}
@@ -1380,9 +1380,9 @@ static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp,
 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp,
 						struct net_device *ol_dev)
 {
+	enum mlxsw_sp_ipip_type ipipt = MLXSW_SP_IPIP_TYPE_MAX;
 	struct mlxsw_sp_ipip_entry *ipip_entry;
 	enum mlxsw_sp_l3proto ul_proto;
-	enum mlxsw_sp_ipip_type ipipt;
 	union mlxsw_sp_l3addr saddr;
 	u32 ul_tb_id;
 
@@ -3231,7 +3231,6 @@ mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
 	u32 adj_index = nh_grp->adj_index; /* base */
 	struct mlxsw_sp_nexthop *nh;
 	int i;
-	int err;
 
 	for (i = 0; i < nh_grp->count; i++) {
 		nh = &nh_grp->nexthops[i];
@@ -3242,6 +3241,8 @@ mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
 		}
 
 		if (nh->update || reallocate) {
+			int err = 0;
+
 			switch (nh->type) {
 			case MLXSW_SP_NEXTHOP_TYPE_ETH:
 				err = mlxsw_sp_nexthop_update
-- 
2.24.1