This is a note to let you know that I've just added the patch titled
IB/core: Protect against self-requeue of a cq work item
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-core-protect-against-self-requeue-of-a-cq-work-item.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Dec 21 09:02:40 CET 2017
From: Sagi Grimberg <sagi@xxxxxxxxxxx>
Date: Wed, 8 Mar 2017 22:00:52 +0200
Subject: IB/core: Protect against self-requeue of a cq work item
From: Sagi Grimberg <sagi@xxxxxxxxxxx>
[ 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@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>--
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/cq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/core/cq.c
+++ b/drivers/infiniband/core/cq.c
@@ -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);
Patches currently in stable-queue which might be from sagi@xxxxxxxxxxx are
queue-4.9/nvme-loop-handle-cpu-unplug-when-re-establishing-the-controller.patch
queue-4.9/ib-core-protect-against-self-requeue-of-a-cq-work-item.patch
queue-4.9/rdma-iser-fix-possible-mr-leak-on-device-removal-event.patch