This is a note to let you know that I've just added the patch titled
[PATCH 093/135] net/mlx5e: Don't modify CQ before it was created
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
0093-net-mlx5e-Don-t-modify-CQ-before-it-was-created.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f27c400e1e9704f855009d6f23cf4827bdb09055 Mon Sep 17 00:00:00 2001
From: Gal Pressman <galp@xxxxxxxxxxxx>
Date: Wed, 2 Mar 2016 00:13:38 +0200
Subject: [PATCH 093/135] net/mlx5e: Don't modify CQ before it was created
[ Upstream commit 2fcb92fbd04eef26dfe7e67839da6262d83d6b65 ]
Calling mlx5e_set_coalesce while the interface is down will result in
modifying CQs that don't exist.
Fixes: f62b8bb8f2d3 ('net/mlx5: Extend mlx5_core to support ConnectX-4
Ethernet functionality')
Signed-off-by: Gal Pressman <galp@xxxxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -422,11 +422,15 @@ static int mlx5e_set_coalesce(struct net
if (!MLX5_CAP_GEN(mdev, cq_moderation))
return -ENOTSUPP;
+ mutex_lock(&priv->state_lock);
priv->params.tx_cq_moderation_usec = coal->tx_coalesce_usecs;
priv->params.tx_cq_moderation_pkts = coal->tx_max_coalesced_frames;
priv->params.rx_cq_moderation_usec = coal->rx_coalesce_usecs;
priv->params.rx_cq_moderation_pkts = coal->rx_max_coalesced_frames;
+ if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
+ goto out;
+
for (i = 0; i < priv->params.num_channels; ++i) {
c = priv->channel[i];
@@ -442,6 +446,8 @@ static int mlx5e_set_coalesce(struct net
coal->rx_max_coalesced_frames);
}
+out:
+ mutex_unlock(&priv->state_lock);
return 0;
}
Patches currently in stable-queue which might be from galp@xxxxxxxxxxxx are
queue-4.4/0093-net-mlx5e-Don-t-modify-CQ-before-it-was-created.patch
queue-4.4/0092-net-mlx5e-Don-t-try-to-modify-CQ-moderation-if-it-is.patch
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