netdev - [PATCH net-next] eth: mlx5: avoid iterator use outside of a loop

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Date:   Wed, 19 Apr 2023 18:58:02 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
        Jakub Kicinski <kuba@...nel.org>, saeedm@...dia.com,
        leon@...nel.org
Subject: [PATCH net-next] eth: mlx5: avoid iterator use outside of a loop

Fix the following warning about risky iterator use:

drivers/net/ethernet/mellanox/mlx5/core/eq.c:1010 mlx5_comp_irq_get_affinity_mask() warn: iterator used outside loop: 'eq'

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
v2:
 - return NULL rather than 0
v1: https://lore.kernel.org/all/20230416101753.GB15386@unreal/

CC: saeedm@...dia.com
CC: leon@...nel.org
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index eb41f0abf798..1c35d721a31d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -1070,10 +1070,11 @@ mlx5_comp_irq_get_affinity_mask(struct mlx5_core_dev *dev, int vector)
 
 	list_for_each_entry(eq, &table->comp_eqs_list, list) {
 		if (i++ == vector)
-			break;
+			return mlx5_irq_get_affinity_mask(eq->core.irq);
 	}
 
-	return mlx5_irq_get_affinity_mask(eq->core.irq);
+	WARN_ON_ONCE(1);
+	return NULL;
 }
 EXPORT_SYMBOL(mlx5_comp_irq_get_affinity_mask);
 
-- 
2.39.2