Commit 528589947c180 ("nvmet: initialize discovery subsys after debugfs
is initialized") changed nvmet_init() to initialize nvme discovery after
"nvmet" debugfs directory is initialized. The change broke nvmet_exit()
because discovery subsystem now depends on debugfs. Debugfs should be
destroyed after discovery subsystem. Fix nvmet_exit() to do that.

Reported-by: Yi Zhang <yi.zhang@redhat.com>
Closes: https://lore.kernel.org/all/CAHj4cs96AfFQpyDKF_MdfJsnOEo=2V7dQgqjFv+k3t7H-=yGhA@mail.gmail.com/
Fixes: 528589947c180 ("nvmet: initialize discovery subsys after debugfs is initialized")
Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
---
 drivers/nvme/target/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 83f3d2f8ef2d0..0dd7bd99afa32 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -1992,8 +1992,8 @@ static int __init nvmet_init(void)
 static void __exit nvmet_exit(void)
 {
 	nvmet_exit_configfs();
-	nvmet_exit_debugfs();
 	nvmet_exit_discovery();
+	nvmet_exit_debugfs();
 	ida_destroy(&cntlid_ida);
 	destroy_workqueue(nvmet_wq);
 	destroy_workqueue(buffered_io_wq);
-- 
2.49.1

On Wed, 06 Aug 2025 22:35:07 -0700, Mohamed Khalfella wrote:
> Commit 528589947c180 ("nvmet: initialize discovery subsys after debugfs
> is initialized") changed nvmet_init() to initialize nvme discovery after
> "nvmet" debugfs directory is initialized. The change broke nvmet_exit()
> because discovery subsystem now depends on debugfs. Debugfs should be
> destroyed after discovery subsystem. Fix nvmet_exit() to do that.
> 
> 
> [...]

Applied, thanks!

[1/1] nvmet: exit debugfs after discovery subsystem exits
      commit: 80f21806b8e34ae1e24c0fc6a0f0dfd9b055e130

Best regards,
-- 
Jens Axboe

On 8/7/25 07:35, Mohamed Khalfella wrote:
> Commit 528589947c180 ("nvmet: initialize discovery subsys after debugfs
> is initialized") changed nvmet_init() to initialize nvme discovery after
> "nvmet" debugfs directory is initialized. The change broke nvmet_exit()
> because discovery subsystem now depends on debugfs. Debugfs should be
> destroyed after discovery subsystem. Fix nvmet_exit() to do that.
> 
> Reported-by: Yi Zhang <yi.zhang@redhat.com>
> Closes: https://lore.kernel.org/all/CAHj4cs96AfFQpyDKF_MdfJsnOEo=2V7dQgqjFv+k3t7H-=yGhA@mail.gmail.com/
> Fixes: 528589947c180 ("nvmet: initialize discovery subsys after debugfs is initialized")
> Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
> ---
>   drivers/nvme/target/core.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
> index 83f3d2f8ef2d0..0dd7bd99afa32 100644
> --- a/drivers/nvme/target/core.c
> +++ b/drivers/nvme/target/core.c
> @@ -1992,8 +1992,8 @@ static int __init nvmet_init(void)
>   static void __exit nvmet_exit(void)
>   {
>   	nvmet_exit_configfs();
> -	nvmet_exit_debugfs();
>   	nvmet_exit_discovery();
> +	nvmet_exit_debugfs();
>   	ida_destroy(&cntlid_ida);
>   	destroy_workqueue(nvmet_wq);
>   	destroy_workqueue(buffered_io_wq);

Hehe. I knew this would've been the case once I've seen the latest
blktest failure. Thanks for fixing it.

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@suse.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich

On Wed, Aug 06, 2025 at 10:35:07PM -0700, Mohamed Khalfella wrote:
> Commit 528589947c180 ("nvmet: initialize discovery subsys after debugfs
> is initialized") changed nvmet_init() to initialize nvme discovery after
> "nvmet" debugfs directory is initialized. The change broke nvmet_exit()
> because discovery subsystem now depends on debugfs. Debugfs should be
> destroyed after discovery subsystem. Fix nvmet_exit() to do that.
> 
> Reported-by: Yi Zhang <yi.zhang@redhat.com>
> Closes: https://lore.kernel.org/all/CAHj4cs96AfFQpyDKF_MdfJsnOEo=2V7dQgqjFv+k3t7H-=yGhA@mail.gmail.com/
> Fixes: 528589947c180 ("nvmet: initialize discovery subsys after debugfs is initialized")
> Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>

Reviewed-by: Daniel Wagner <dwagner@suse.de>