[PATCH V2 net-next 05/10] net/mlx4: Add a check if there are too many reserved QPs
From: Or Gerlitz <hidden>
Date: 2014-12-11 08:59:11
Subsystem:
mellanox mlx4 core vpi driver, networking drivers, the rest · Maintainers:
Tariq Toukan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Dotan Barak <redacted> 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 <redacted> Signed-off-by: Matan Barak <redacted> Signed-off-by: Or Gerlitz <redacted> --- drivers/net/ethernet/mellanox/mlx4/qp.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c
index 40e82ed..8720428 100644
--- a/drivers/net/ethernet/mellanox/mlx4/qp.c
+++ b/drivers/net/ethernet/mellanox/mlx4/qp.c@@ -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;
--
1.7.1