netdev - [PATCH net V2 2/3] net/mlx4_core: Fix wrong calculation of free counters

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Message-Id: <1513181531-17522-3-git-send-email-tariqt@mellanox.com>
Date:   Wed, 13 Dec 2017 18:12:10 +0200
From:   Tariq Toukan <tariqt@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eran Ben Elisha <eranbe@...lanox.com>,
        Tariq Toukan <tariqt@...lanox.com>
Subject: [PATCH net V2 2/3] net/mlx4_core: Fix wrong calculation of free counters

From: Eran Ben Elisha <eranbe@...lanox.com>

The field res_free indicates the total number of counters which are
available for allocation (reserved and unreserved). Fixed a bug where
the reserved counters were subtracted from res_free before any
allocation was performed.

Before this fix, free counters which were not reserved could not be
allocated.

Fixes: 9de92c60beaa ("net/mlx4_core: Adjust counter grant policy in the resource tracker")
Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
Reviewed-by: Jack Morgenstein <jackm@....mellanox.co.il>
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/resource_tracker.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 04304dd894c6..606a0e0beeae 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -611,7 +611,6 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev)
 						MLX4_MAX_PORTS;
 				else
 					res_alloc->guaranteed[t] = 0;
-				res_alloc->res_free -= res_alloc->guaranteed[t];
 				break;
 			default:
 				break;
-- 
1.8.3.1