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

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

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.com>
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dotan Barak 2019-11-03 11:11:35 +02:00 • committed by David S. Miller
parent e684000b8a
commit 57d0f00dfe
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/mellanox/mlx4/main.c
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@ -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;