diff mbox series

[v3,05/16] nvmet-fcloop: Remove remote port from list when unlinking

Message ID 20231218153105.12717-6-dwagner@suse.de
State New
Headers
Series enable nvmet-fc for blktests |

Commit Message

Daniel Wagner Dec. 18, 2023, 3:30 p.m. UTC 
  The remote port is removed too late from fcloop_nports list. Remove it
when port is unregistered.

This prevents a busy loop in fcloop_exit, because it is possible the
remote port is found in the list and thus we will never progress.

The kernel log will be spammed with

  nvme_fcloop: fcloop_exit: Failed deleting remote port
  nvme_fcloop: fcloop_exit: Failed deleting target port

Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/nvme/target/fcloop.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

Comments

Christoph Hellwig Dec. 19, 2023, 4:31 a.m. UTC | #1 
Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke Dec. 19, 2023, 7:26 a.m. UTC | #2 
On 12/18/23 16:30, Daniel Wagner wrote:
> The remote port is removed too late from fcloop_nports list. Remove it
> when port is unregistered.
> 
> This prevents a busy loop in fcloop_exit, because it is possible the
> remote port is found in the list and thus we will never progress.
> 
> The kernel log will be spammed with
> 
>    nvme_fcloop: fcloop_exit: Failed deleting remote port
>    nvme_fcloop: fcloop_exit: Failed deleting target port
> 
> Signed-off-by: Daniel Wagner <dwagner@suse.de>
> ---
>   drivers/nvme/target/fcloop.c | 7 ++-----
>   1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
> index c65a73433c05..ead349af30f1 100644
> --- a/drivers/nvme/target/fcloop.c
> +++ b/drivers/nvme/target/fcloop.c
> @@ -995,11 +995,6 @@ fcloop_nport_free(struct kref *ref)
>   {
>   	struct fcloop_nport *nport =
>   		container_of(ref, struct fcloop_nport, ref);
> -	unsigned long flags;
> -
> -	spin_lock_irqsave(&fcloop_lock, flags);
> -	list_del(&nport->nport_list);
> -	spin_unlock_irqrestore(&fcloop_lock, flags);
>   
>   	kfree(nport);
>   }
> @@ -1357,6 +1352,8 @@ __unlink_remote_port(struct fcloop_nport *nport)
>   		nport->tport->remoteport = NULL;
>   	nport->rport = NULL;
>   
> +	list_del(&nport->nport_list);
> +
>   	return rport;
>   }
>   
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
diff mbox series

Patch

diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
index c65a73433c05..ead349af30f1 100644
--- a/drivers/nvme/target/fcloop.c
+++ b/drivers/nvme/target/fcloop.c
@@ -995,11 +995,6 @@  fcloop_nport_free(struct kref *ref)
 {
 	struct fcloop_nport *nport =
 		container_of(ref, struct fcloop_nport, ref);
-	unsigned long flags;
-
-	spin_lock_irqsave(&fcloop_lock, flags);
-	list_del(&nport->nport_list);
-	spin_unlock_irqrestore(&fcloop_lock, flags);
 
 	kfree(nport);
 }
@@ -1357,6 +1352,8 @@  __unlink_remote_port(struct fcloop_nport *nport)
 		nport->tport->remoteport = NULL;
 	nport->rport = NULL;
 
+	list_del(&nport->nport_list);
+
 	return rport;
 }