linux-kernel - [PATCH 4.9 076/109] nvmet: cancel fatal error and flush async work before free controller

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Date:   Thu,  7 Dec 2017 13:57:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roy Shterman <roys@...htbitslabs.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Christoph Hellwig <hch@....de>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 076/109] nvmet: cancel fatal error and flush async work before free controller

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sagi Grimberg <sagi@...mberg.me>


[ Upstream commit 06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5 ]

Make sure they are not running and we can free the controller
safely.

Signed-off-by: Roy Shterman <roys@...htbitslabs.com>
Signed-off-by: Sagi Grimberg <sagi@...mberg.me>
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/nvme/target/core.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -816,6 +816,9 @@ static void nvmet_ctrl_free(struct kref
 	list_del(&ctrl->subsys_entry);
 	mutex_unlock(&subsys->lock);
 
+	flush_work(&ctrl->async_event_work);
+	cancel_work_sync(&ctrl->fatal_err_work);
+
 	ida_simple_remove(&subsys->cntlid_ida, ctrl->cntlid);
 	nvmet_subsys_put(subsys);