3.6.11.1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Kleber Sacilotto de Souza <kleb...@linux.vnet.ibm.com>
[ Upstream commit 77c5d9e186705280ca6eff08f3280a5f70c79f8e ]
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 <kleb...@linux.vnet.ibm.com>
Acked-by: Amir Vadai <am...@mellanox.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index edd9cb8..aa9122f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1435,7 +1435,7 @@ int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
}
#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;
--
1.7.10.4
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