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

[Greg Kroah-Hartman]

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

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

From: Sagi Grimberg <s...@grimberg.me>


[ Upstream commit 06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5 ]

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

Signed-off-by: Roy Shterman <r...@lightbitslabs.com>
Signed-off-by: Sagi Grimberg <s...@grimberg.me>
Reviewed-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.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);