diff options
| author | Amir Vadai <amirv@mellanox.com> | 2013-03-07 03:46:57 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-07 15:52:04 -0500 |
| commit | a229e488ac3f904d06c20d8d3f47831db3c7a15a (patch) | |
| tree | aea8161b5ec5c7f9ffa6aa6e001f5a3f5ac32603 | |
| parent | 83a5a6cef40616d19a388f560447e99c2ca04d1e (diff) | |
| download | linux-a229e488ac3f904d06c20d8d3f47831db3c7a15a.tar.gz linux-a229e488ac3f904d06c20d8d3f47831db3c7a15a.tar.bz2 linux-a229e488ac3f904d06c20d8d3f47831db3c7a15a.zip | |
net/mlx4_en: Disable RFS when running in SRIOV mode
Commit 37706996 "mlx4_en: fix allocation of CPU affinity reverse-map" fixed
a bug when mlx4_dev->caps.comp_pool is larger from the device rx rings, but
introduced a regression.
When the mlx4_core is activating its "legacy mode" (e.g when running in SRIOV
mode) w.r.t to EQs/IRQs usage, comp_pool becomes zero and we're crashing on
divide by zero alloc_cpu_rmap.
Fix that by enabling RFS only when running in non-legacy mode.
Reported-by: Yan Burman <yanb@mellanox.com>
Cc: Kleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 7fd0936967c4..995d4b6d5c1e 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1833,9 +1833,11 @@ int mlx4_en_alloc_resources(struct mlx4_en_priv *priv) } #ifdef CONFIG_RFS_ACCEL - priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool); - if (!priv->dev->rx_cpu_rmap) - goto err; + if (priv->mdev->dev->caps.comp_pool) { + priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool); + if (!priv->dev->rx_cpu_rmap) + goto err; + } #endif return 0; |