Commit 57d0f00d authored by Dotan Barak's avatar Dotan Barak Committed by David S. Miller
Browse files

mlx4_core: fix wrong comment about the reason of subtract one from the max_cqes 



The reason for the pre-allocation of one CQE is to enable resizing of
the CQ.
Fix comment accordingly.

Signed-off-by: default avatarDotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: default avatarEli Cohen <eli@mellanox.co.il>
Signed-off-by: default avatarVladimir Sokolovsky <vlad@mellanox.com>
Signed-off-by: default avatarYuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e684000b

drivers/net/ethernet/mellanox/mlx4/main.c

+1 −2
Original line number Diff line number Diff line
@@ -514,8 +514,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap) 
	dev->caps.max_rq_desc_sz     = dev_cap->max_rq_desc_sz;

	/*

	 * Subtract 1 from the limit because we need to allocate a

	 * spare CQE so the HCA HW can tell the difference between an

	 * empty CQ and a full CQ.

	 * spare CQE to enable resizing the CQ.

	 */

	dev->caps.max_cqes	     = dev_cap->max_cq_sz - 1;

	dev->caps.reserved_cqs	     = dev_cap->reserved_cqs;