netdev - [PATCH AUTOSEL 5.6 14/17] net/mlx5e: replace EINVAL in mlx5e_flower_parse

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Message-Id: <20200605122517.2882338-14-sashal@kernel.org>
Date:   Fri,  5 Jun 2020 08:25:13 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: [PATCH AUTOSEL 5.6 14/17] net/mlx5e: replace EINVAL in mlx5e_flower_parse_meta()

From: Pablo Neira Ayuso <pablo@...filter.org>

[ Upstream commit a683012a8e77675a1947cc8f11f97cdc1d5bb769 ]

The drivers reports EINVAL to userspace through netlink on invalid meta
match. This is confusing since EINVAL is usually reserved for malformed
netlink messages. Replace it by more meaningful codes.

Fixes: 6d65bc64e232 ("net/mlx5e: Add mlx5e_flower_parse_meta support")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 4659c205cc01..46ff83408d05 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1824,7 +1824,7 @@ static int mlx5e_flower_parse_meta(struct net_device *filter_dev,
 	flow_rule_match_meta(rule, &match);
 	if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex mask");
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	}
 
 	ingress_dev = __dev_get_by_index(dev_net(filter_dev),
@@ -1832,13 +1832,13 @@ static int mlx5e_flower_parse_meta(struct net_device *filter_dev,
 	if (!ingress_dev) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Can't find the ingress port to match on");
-		return -EINVAL;
+		return -ENOENT;
 	}
 
 	if (ingress_dev != filter_dev) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Can't match on the ingress filter port");
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	}
 
 	return 0;
-- 
2.25.1