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net/mlx4: Add a check if there are too many reserved QPs

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The number of reserved QPs is affected both from the firmware and
from the driver's requirements. This patch adds a check that
validates that this number is indeed feasable.

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dotan Barak 2014-12-11 10:57:55 +02:00 committed by David S. Miller
parent ddae0349fd
commit ab256e5ad0
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/mellanox/mlx4/qp.c
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@ -478,6 +478,7 @@ int mlx4_init_qp_table(struct mlx4_dev *dev)
struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
int err;
int reserved_from_top = 0;
int reserved_from_bot;
int k;
spin_lock_init(&qp_table->lock);
@ -534,9 +535,14 @@ int mlx4_init_qp_table(struct mlx4_dev *dev)
* b. All the proxy SQPs (8 per function)
* c. All the tunnel QPs (8 per function)
*/
reserved_from_bot = mlx4_num_reserved_sqps(dev);
if (reserved_from_bot + reserved_from_top > dev->caps.num_qps) {
mlx4_err(dev, "Number of reserved QPs is higher than number of QPs\n");
return -EINVAL;
}
err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
(1 << 23) - 1, mlx4_num_reserved_sqps(dev),
(1 << 23) - 1, reserved_from_bot,
reserved_from_top);
if (err)
return err;