netdev - [PATCH 4/9 V2] mlx4_en: Verify number of RX rings doesn't exceed MAX_RX

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Date:	Mon, 29 Dec 2008 11:56:47 +0200
From:	Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To:	davem@...emloft.net
CC:	jeff@...zik.org, rdreier@...co.com, netdev@...r.kernel.org
Subject: [PATCH 4/9 V2] 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 <yevgenyp@...lanox.co.il>
---
 drivers/net/mlx4/en_main.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/mlx4/en_main.c b/drivers/net/mlx4/en_main.c
index c1c0585..34f3a19 100644
--- 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
-- 
1.5.4

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