3.8-stable review patch. If anyone has any objections, please let me know. ------------------ 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; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html