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Commit 6d90aa5c authored by Matan Barak's avatar Matan Barak Committed by David S. Miller
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net/mlx4_core: Make sure there are no pending async events when freeing CQ 



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: default avatarMatan Barak <matanb@mellanox.com>
Signed-off-by: default avatarIdo Shamay <idos@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent de161803

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

+3 −0
Original line number Diff line number Diff line
@@ -369,6 +369,9 @@ 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);