mlx4_en: Verify number of RX rings doesn't exceed MAX_RX_RINGS

Required in cases were dev->caps.num_comp_vectors > MAX_RX_RINGS.
For current values this would happen on machines that have more
then 16 cores.

Signed-off-by: Yevgeny Petrilin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/mlx4/en_main.c b/drivers/net/mlx4/en_main.c
index c1c05852a95ebf34e357f86a6b0465758e5458f9..34f3a191fbdf759b755c9acffcd8339bc0d4ffba 100644 (file)
--- a/drivers/net/mlx4/en_main.c
+++ b/drivers/net/mlx4/en_main.c
@@ -170,7 +170,8 @@ static void *mlx4_en_add(struct mlx4_dev *dev)
                mlx4_info(mdev, "Using %d tx rings for port:%d\n",
                          mdev->profile.prof[i].tx_ring_num, i);
                if (!mdev->profile.prof[i].rx_ring_num) {
-                       mdev->profile.prof[i].rx_ring_num = dev->caps.num_comp_vectors;
+                       mdev->profile.prof[i].rx_ring_num =
+                               min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS);
                        mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
                                  mdev->profile.prof[i].rx_ring_num, i);
                } else