From: Yang Li <yang.lee@linux.alibaba.com>
To: davem@davemloft.net
Cc: edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
saeedm@nvidia.com, leon@kernel.org, netdev@vger.kernel.org,
simon.horman@corigine.com, linux-rdma@vger.kernel.org,
linux-kernel@vger.kernel.org,
Yang Li <yang.lee@linux.alibaba.com>,
Abaci Robot <abaci@linux.alibaba.com>
Subject: [PATCH net-next v3] net/mlx5e: Remove NULL check before dev_{put, hold}
Date: Tue, 4 Apr 2023 15:29:32 +0800 [thread overview]
Message-ID: <20230404072932.88383-1-yang.lee@linux.alibaba.com> (raw)
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:72:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:80:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:734:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:769:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.
./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1450:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4667
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
---
change in v3:
--According to Leon's suggestion, do this cleanup for whole driver.
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 9 +++------
.../net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c | 10 +++-------
drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +--
3 files changed, 7 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
index 00a04fdd756f..20f6e7ed7475 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -31,8 +31,7 @@ static void mlx5e_tc_tun_route_attr_cleanup(struct mlx5e_tc_tun_route_attr *attr
{
if (attr->n)
neigh_release(attr->n);
- if (attr->route_dev)
- dev_put(attr->route_dev);
+ dev_put(attr->route_dev);
}
struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev)
@@ -68,16 +67,14 @@ static int get_route_and_out_devs(struct mlx5e_priv *priv,
* while holding rcu read lock. Take the net_device for correctness
* sake.
*/
- if (uplink_upper)
- dev_hold(uplink_upper);
+ dev_hold(uplink_upper);
rcu_read_unlock();
dst_is_lag_dev = (uplink_upper &&
netif_is_lag_master(uplink_upper) &&
real_dev == uplink_upper &&
mlx5_lag_is_sriov(priv->mdev));
- if (uplink_upper)
- dev_put(uplink_upper);
+ dev_put(uplink_upper);
/* if the egress device isn't on the same HW e-switch or
* it's a LAG device, use the uplink
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
index 20c2d2ecaf93..2cb2ba857155 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
@@ -32,9 +32,7 @@ static int mlx5e_set_int_port_tunnel(struct mlx5e_priv *priv,
&attr->action, out_index);
out:
- if (route_dev)
- dev_put(route_dev);
-
+ dev_put(route_dev);
return err;
}
@@ -730,8 +728,7 @@ static int mlx5e_set_vf_tunnel(struct mlx5_eswitch *esw,
}
out:
- if (route_dev)
- dev_put(route_dev);
+ dev_put(route_dev);
return err;
}
@@ -765,8 +762,7 @@ static int mlx5e_update_vf_tunnel(struct mlx5_eswitch *esw,
mlx5e_tc_match_to_reg_mod_hdr_change(esw->dev, mod_hdr_acts, VPORT_TO_REG, act_id, data);
out:
- if (route_dev)
- dev_put(route_dev);
+ dev_put(route_dev);
return err;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index 5d331b940f4d..f0216bf6e215 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -1446,8 +1446,7 @@ struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev)
} else {
ndev = ldev->pf[MLX5_LAG_P1].netdev;
}
- if (ndev)
- dev_hold(ndev);
+ dev_hold(ndev);
unlock:
spin_unlock_irqrestore(&lag_lock, flags);
--
2.20.1.7.g153144c
next reply other threads:[~2023-04-04 7:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-04 7:29 Yang Li [this message]
2023-04-04 16:44 ` [PATCH net-next v3] net/mlx5e: Remove NULL check before dev_{put, hold} Leon Romanovsky
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230404072932.88383-1-yang.lee@linux.alibaba.com \
--to=yang.lee@linux.alibaba.com \
--cc=abaci@linux.alibaba.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=kuba@kernel.org \
--cc=leon@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=saeedm@nvidia.com \
--cc=simon.horman@corigine.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).