[PATCH AUTOSEL 5.12 39/49] nvme-loop: do not warn for deleted controllers during reset

Sasha Levin
2021-06-07T16:15:11Z

From: Hannes Reinecke <hare@suse.de>

[ Upstream commit 6622f9acd29cd4f6272720e827e6406f5a970cb0 ]

During concurrent reset and delete calls the reset workqueue is
flushed, causing nvme_loop_reset_ctrl_work() to be executed when
the controller is in state DELETING or DELETING_NOIO.
But this is expected, so we shouldn't issue a WARN_ON here.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/target/loop.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index fe14609d2254..0f22f333ff24 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -463,8 +463,10 @@ static void nvme_loop_reset_ctrl_work(struct work_struct *work)
nvme_loop_shutdown_ctrl(ctrl);

if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) {
- /* state change failure should never happen */
- WARN_ON_ONCE(1);
+ if (ctrl->ctrl.state != NVME_CTRL_DELETING &&
+ ctrl->ctrl.state != NVME_CTRL_DELETING_NOIO)
+ /* state change failure for non-deleted ctrl? */
+ WARN_ON_ONCE(1);
return;
}

--
2.30.2