linux-kernel - [PATCH 5.8 026/118] nvme-fc: cancel async events before freeing event struct

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Message-Id: <20200921162037.526784222@linuxfoundation.org>
Date:   Mon, 21 Sep 2020 18:27:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Milburn <dmilburn@...hat.com>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Christoph Hellwig <hch@....de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 026/118] nvme-fc: cancel async events before freeing event struct

From: David Milburn <dmilburn@...hat.com>

[ Upstream commit e126e8210e950bb83414c4f57b3120ddb8450742 ]

Cancel async event work in case async event has been queued up, and
nvme_fc_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@...hat.com>
Reviewed-by: Keith Busch <kbusch@...nel.org>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/host/fc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 1a2b6910509ca..92c966ac34c20 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2158,6 +2158,7 @@ nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl)
 	struct nvme_fc_fcp_op *aen_op;
 	int i;
 
+	cancel_work_sync(&ctrl->ctrl.async_event_work);
 	aen_op = ctrl->aen_ops;
 	for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) {
 		__nvme_fc_exit_request(ctrl, aen_op);
-- 
2.25.1