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IB/mlx4: Fix race condition between catas error reset and aliasguid flows

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[ Upstream commit 587443e7773e150ae29e643ee8f41a1eed226565 ]

Code review revealed a race condition which could allow the catas error
flow to interrupt the alias guid query post mechanism at random points.
Thiis is fixed by doing cancel_delayed_work_sync() instead of
cancel_delayed_work() during the alias guid mechanism destroy flow.

Fixes: a0c64a17aba8 ("mlx4: Add alias_guid mechanism")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jack Morgenstein 2019-03-06 19:17:56 +02:00 committed by Greg Kroah-Hartman
parent 5e6e33fd75
commit 6edfeb304b
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx4/alias_GUID.c
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@ -805,8 +805,8 @@ void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev)
unsigned long flags;
for (i = 0 ; i < dev->num_ports; i++) {
cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work);
det = &sriov->alias_guid.ports_guid[i];
cancel_delayed_work_sync(&det->alias_guid_work);
spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
while (!list_empty(&det->cb_list)) {
cb_ctx = list_entry(det->cb_list.next,