Patch "[PATCH 093/135] net/mlx5e: Don't modify CQ before it was created" has been added to the 4.4-stable tree

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 <[email protected]> know about it.

From: Gal Pressman <[email protected]>
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.

Ethernet functionality')

---
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -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 [email protected] 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