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IB/mlx5: Flush cache workqueue before destroying it

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Destroying the workqueue without flushing it first can lead to a case
in which the kernel tries to push a delayed work to the workqueue
which does not exist anymore.

Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Moshe Lazer 2013-09-11 16:35:23 +03:00 committed by Roland Dreier
parent b125a54bfd
commit 3c4619114c
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/mlx5/mr.c
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@ -415,6 +415,7 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
int size;
int err;
cancel_delayed_work(&ent->dwork);
while (1) {
spin_lock(&ent->lock);
if (list_empty(&ent->head)) {
@ -540,13 +541,15 @@ int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev)
int i;
dev->cache.stopped = 1;
destroy_workqueue(dev->cache.wq);
flush_workqueue(dev->cache.wq);
mlx5_mr_cache_debugfs_cleanup(dev);
for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++)
clean_keys(dev, i);
destroy_workqueue(dev->cache.wq);
return 0;
}