[PATCH net-next 4/4] net/mlx4_core: Make sure there are no pending async events when freeing CQ
From: Or Gerlitz <hidden>
Date: 2015-05-28 15:41:47
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: Matan Barak <redacted> When freeing a CQ, we need to make sure there are no asynchronous events (on the ASYNC EQ) that could relate to this CQ before freeing it. This is done by introducing synchronize_irq. Signed-off-by: Matan Barak <redacted> Signed-off-by: Ido Shamay <redacted> Signed-off-by: Or Gerlitz <redacted> --- drivers/net/ethernet/mellanox/mlx4/cq.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
index 7431cd4..1fc1dc5 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cq.c@@ -369,6 +369,10 @@ void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq) mlx4_warn(dev, "HW2SW_CQ failed (%d) for CQN %06x\n", err, cq->cqn); synchronize_irq(priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq->vector)].irq); + if (priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq->vector)].irq != + priv->eq_table.eq[MLX4_EQ_ASYNC].irq) + synchronize_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq); + spin_lock_irq(&cq_table->lock); radix_tree_delete(&cq_table->tree, cq->cqn);
--
1.7.1