From 2d51837fa1ee7ff5c42f34b07dc460daff6afda1 Mon Sep 17 00:00:00 2001 From: Eugenia Emantayev Date: Thu, 24 Jan 2013 01:54:14 +0000 Subject: [PATCH] net/mlx4_en: Issue the dump eth statistics command under lock Performing the DUMP_ETH_STATS firmware command outside the lock leads to kernel panic when data structures such as RX/TX rings are freed in parallel, e.g when one changes the mtu or ring sizes. Signed-off-by: Eugenia Emantayev Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index b4675138533a..b6c645fc6c48 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -977,12 +977,12 @@ static void mlx4_en_do_get_stats(struct work_struct *work) struct mlx4_en_dev *mdev = priv->mdev; int err; - err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0); - if (err) - en_dbg(HW, priv, "Could not update stats\n"); - mutex_lock(&mdev->state_lock); if (mdev->device_up) { + err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0); + if (err) + en_dbg(HW, priv, "Could not update stats\n"); + if (priv->port_up) mlx4_en_auto_moderation(priv); -- 2.30.2