This is a note to let you know that I've just added the patch titled
mlx4_en: fix allocation of CPU affinity reverse-map
to the 3.8-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:
mlx4_en-fix-allocation-of-cpu-affinity-reverse-map.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6bbae7e2f6bb5d68f6440e58bb3e3fe541c7099f Mon Sep 17 00:00:00 2001
From: Kleber Sacilotto de Souza <klebers@xxxxxxxxxxxxxxxxxx>
Date: Fri, 22 Feb 2013 19:14:52 +0000
Subject: mlx4_en: fix allocation of CPU affinity reverse-map
From: Kleber Sacilotto de Souza <klebers@xxxxxxxxxxxxxxxxxx>
[ Upstream commit 3770699675dd1b8fc1e86ff369eb3cce44e10082 ]
The mlx4_en driver allocates the number of objects for the CPU affinity
reverse-map based on the number of rx rings of the device. However,
mlx4_assign_eq() calls irq_cpu_rmap_add() as many times as IRQ's are
assigned to EQ's, which can be as large as mlx4_dev->caps.comp_pool. If
caps.comp_pool is larger than rx_ring_num we will eventually hit the
BUG_ON() in cpu_rmap_add().
Fix this problem by allocating space for the maximum number of CPU
affinity reverse-map objects we might want to add.
Signed-off-by: Kleber Sacilotto de Souza <klebers@xxxxxxxxxxxxxxxxxx>
Acked-by: Amir Vadai <amirv@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1434,7 +1434,7 @@ int mlx4_en_alloc_resources(struct mlx4_
}
#ifdef CONFIG_RFS_ACCEL
- priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->rx_ring_num);
+ priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool);
if (!priv->dev->rx_cpu_rmap)
goto err;
Patches currently in stable-queue which might be from klebers@xxxxxxxxxxxxxxxxxx are
queue-3.8/mlx4_en-fix-allocation-of-device-tx_cq.patch
queue-3.8/mlx4_en-fix-allocation-of-cpu-affinity-reverse-map.patch
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