netdev - [PATCH net-next 12/15] net/mlx5: HWS, handle returned error value in pool alloc

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Message-ID: <20250102181415.1477316-13-tariqt@nvidia.com>
Date: Thu, 2 Jan 2025 20:14:11 +0200
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>, "Andrew
 Lunn" <andrew+netdev@...n.ch>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, Mark Bloch
	<mbloch@...dia.com>, Moshe Shemesh <moshe@...dia.com>, Yevgeny Kliteynik
	<kliteyn@...dia.com>, Vlad Dogaru <vdogaru@...dia.com>, Tariq Toukan
	<tariqt@...dia.com>
Subject: [PATCH net-next 12/15] net/mlx5: HWS, handle returned error value in pool alloc

From: Vlad Dogaru <vdogaru@...dia.com>

Handle all negative return values as errors, not just -1.
The code previously treated -ENOMEM (and potentially other negative
values) as valid segment numbers, leading to incorrect behavior.
This fix ensures that any negative return value is treated as an error.

Signed-off-by: Vlad Dogaru <vdogaru@...dia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Reviewed-by: Mark Bloch <mbloch@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/pool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/pool.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/pool.c
index fed2d913f3b8..50a81d360bb2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/pool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/pool.c
@@ -183,7 +183,7 @@ static int hws_pool_buddy_get_mem_chunk(struct mlx5hws_pool *pool,
 	*seg = -1;
 
 	/* Find the next free place from the buddy array */
-	while (*seg == -1) {
+	while (*seg < 0) {
 		for (i = 0; i < MLX5HWS_POOL_RESOURCE_ARR_SZ; i++) {
 			buddy = hws_pool_buddy_get_next_buddy(pool, i,
 							      order,
@@ -194,7 +194,7 @@ static int hws_pool_buddy_get_mem_chunk(struct mlx5hws_pool *pool,
 			}
 
 			*seg = mlx5hws_buddy_alloc_mem(buddy, order);
-			if (*seg != -1)
+			if (*seg >= 0)
 				goto found;
 
 			if (pool->flags & MLX5HWS_POOL_FLAGS_ONE_RESOURCE) {
-- 
2.45.0