netdev - [PATCH net V2 03/12] net/mlx5: offset comp irq index in name by one

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Date: Tue, 9 Apr 2024 22:08:11 +0300
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>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, Michael Liang
	<mliang@...estorage.com>, Mohamed Khalfella <mkhalfella@...estorage.com>,
	Yuanyuan Zhong <yzhong@...estorage.com>, Shay Drory <shayd@...dia.com>,
	"Tariq Toukan" <tariqt@...dia.com>
Subject: [PATCH net V2 03/12] net/mlx5: offset comp irq index in name by one

From: Michael Liang <mliang@...estorage.com>

The mlx5 comp irq name scheme is changed a little bit between
commit 3663ad34bc70 ("net/mlx5: Shift control IRQ to the last index")
and commit 3354822cde5a ("net/mlx5: Use dynamic msix vectors allocation").
The index in the comp irq name used to start from 0 but now it starts
from 1. There is nothing critical here, but it's harmless to change
back to the old behavior, a.k.a starting from 0.

Fixes: 3354822cde5a ("net/mlx5: Use dynamic msix vectors allocation")
Reviewed-by: Mohamed Khalfella <mkhalfella@...estorage.com>
Reviewed-by: Yuanyuan Zhong <yzhong@...estorage.com>
Signed-off-by: Michael Liang <mliang@...estorage.com>
Reviewed-by: Shay Drory <shayd@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
index 4dcf995cb1a2..6bac8ad70ba6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
@@ -19,6 +19,7 @@
 #define MLX5_IRQ_CTRL_SF_MAX 8
 /* min num of vectors for SFs to be enabled */
 #define MLX5_IRQ_VEC_COMP_BASE_SF 2
+#define MLX5_IRQ_VEC_COMP_BASE 1
 
 #define MLX5_EQ_SHARE_IRQ_MAX_COMP (8)
 #define MLX5_EQ_SHARE_IRQ_MAX_CTRL (UINT_MAX)
@@ -246,6 +247,7 @@ static void irq_set_name(struct mlx5_irq_pool *pool, char *name, int vecidx)
 		return;
 	}
 
+	vecidx -= MLX5_IRQ_VEC_COMP_BASE;
 	snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", vecidx);
 }
 
@@ -585,7 +587,7 @@ struct mlx5_irq *mlx5_irq_request_vector(struct mlx5_core_dev *dev, u16 cpu,
 	struct mlx5_irq_table *table = mlx5_irq_table_get(dev);
 	struct mlx5_irq_pool *pool = table->pcif_pool;
 	struct irq_affinity_desc af_desc;
-	int offset = 1;
+	int offset = MLX5_IRQ_VEC_COMP_BASE;
 
 	if (!pool->xa_num_irqs.max)
 		offset = 0;
-- 
2.44.0