linux-kernel - [PATCH AUTOSEL for 4.9 43/54] nvmet: cancel fatal error and flush async work before free controller

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Message-ID: <20171122222344.19782-43-alexander.levin@verizon.com>
Date:   Wed, 22 Nov 2017 22:24:01 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Sagi Grimberg <sagi@...mberg.me>,
        Roy Shterman <roys@...htbitslabs.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 43/54] nvmet: cancel fatal error and flush
 async work before free controller

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>
---
 drivers/nvme/target/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 55ce769cecee..fbd6d487103f 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -816,6 +816,9 @@ static void nvmet_ctrl_free(struct kref *ref)
 	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);
 
-- 
2.11.0