linux-kernel - [PATCH 3.16 215/305] IB/mlx4: Fix the SQ size of an RC QP

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Date:	Sat, 13 Aug 2016 18:42:51 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Leon Romanovsky" <leon@...nel.org>,
	"Jack Morgenstein" <jackm@...lanox.co.il>,
	"Yishai Hadas" <yishaih@...lanox.com>,
	"Doug Ledford" <dledford@...hat.com>,
	"Eran Ben Elisha" <eranbe@...lanox.com>
Subject: [PATCH 3.16 215/305] IB/mlx4: Fix the SQ size of an RC QP

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Yishai Hadas <yishaih@...lanox.com>

commit f2940e2c76bb554a7fbdd28ca5b90904117a9e96 upstream.

When calculating the required size of an RC QP send queue, leave
enough space for masked atomic operations, which require more space than
"regular" atomic operation.

Fixes: 6fa8f719844b ("IB/mlx4: Add support for masked atomic operations")
Signed-off-by: Yishai Hadas <yishaih@...lanox.com>
Reviewed-by: Jack Morgenstein <jackm@...lanox.co.il>
Reviewed-by: Eran Ben Elisha <eranbe@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/mlx4/qp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -361,7 +361,7 @@ static int send_wqe_overhead(enum mlx4_i
 			sizeof (struct mlx4_wqe_raddr_seg);
 	case MLX4_IB_QPT_RC:
 		return sizeof (struct mlx4_wqe_ctrl_seg) +
-			sizeof (struct mlx4_wqe_atomic_seg) +
+			sizeof (struct mlx4_wqe_masked_atomic_seg) +
 			sizeof (struct mlx4_wqe_raddr_seg);
 	case MLX4_IB_QPT_SMI:
 	case MLX4_IB_QPT_GSI: