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IB/core: Protect against self-requeue of a cq work item

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[ Upstream commit 86f46aba8d1ac3ed0904542158a9b9cb9c7a143c ]

We need to make sure that the cq work item does not
run when we are destroying the cq. Unlike flush_work,
cancel_work_sync protects against self-requeue of the
work item (which we can do in ib_cq_poll_work).

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sagi Grimberg 2017-03-08 22:00:52 +02:00 committed by Greg Kroah-Hartman
parent 26452a5033
commit cd083d5bca
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/cq.c
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@ -196,7 +196,7 @@ void ib_free_cq(struct ib_cq *cq)
irq_poll_disable(&cq->iop);
break;
case IB_POLL_WORKQUEUE:
flush_work(&cq->work);
cancel_work_sync(&cq->work);
break;
default:
WARN_ON_ONCE(1);