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From: Nathan Chancellor <natechancellor@gmail.com>
To: Saeed Mahameed <saeedm@mellanox.com>, Leon Romanovsky <leon@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
	Parav Pandit <parav@mellanox.com>,
	linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
	Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH net-next] mlx5: Restore err assignment in mlx5_mdev_init
Date: Fri, 29 May 2020 22:54:48 -0700	[thread overview]
Message-ID: <20200530055447.1028004-1-natechancellor@gmail.com> (raw)

Clang warns:

drivers/net/ethernet/mellanox/mlx5/core/main.c:1278:6: warning: variable
'err' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
        if (!priv->dbg_root) {
            ^~~~~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx5/core/main.c:1303:9: note:
uninitialized use occurs here
        return err;
               ^~~
drivers/net/ethernet/mellanox/mlx5/core/main.c:1278:2: note: remove the
'if' if its condition is always false
        if (!priv->dbg_root) {
        ^~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx5/core/main.c:1259:9: note: initialize
the variable 'err' to silence this warning
        int err;
               ^
                = 0
1 warning generated.

This path previously returned -ENOMEM, restore that error code so that
it is not uninitialized.

Fixes: 810cbb25549b ("net/mlx5: Add missing mutex destroy")
Link: https://github.com/ClangBuiltLinux/linux/issues/1042
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index df46b1fce3a7..ac68445fde2d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1277,6 +1277,7 @@ static int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
 					    mlx5_debugfs_root);
 	if (!priv->dbg_root) {
 		dev_err(dev->device, "mlx5_core: error, Cannot create debugfs dir, aborting\n");
+		err = -ENOMEM;
 		goto err_dbg_root;
 	}
 

base-commit: c0cc73b79123e67b212bd537a7af88e52c9fbeac
-- 
2.27.0.rc0


             reply	other threads:[~2020-05-30  5:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-30  5:54 Nathan Chancellor [this message]
2020-05-31  9:58 ` Leon Romanovsky
2020-06-02  4:07   ` Nathan Chancellor
2020-06-02  7:07     ` Leon Romanovsky

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