[PATCH v2 3/5] nvmet-fcloop: Remove remote port from list when unlinking

From: Daniel Wagner <dwagner@suse.de>
To: linux-nvme@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Shin'ichiro Kawasaki <shinichiro@fastmail.com>,
	Sagi Grimberg <sagi@grimberg.me>, Hannes Reinecke <hare@suse.de>,
	James Smart <jsmart2021@gmail.com>,
	Daniel Wagner <dwagner@suse.de>
Subject: [PATCH v2 3/5] nvmet-fcloop: Remove remote port from list when unlinking
Date: Tue, 20 Jun 2023 15:37:09 +0200	[thread overview]
Message-ID: <20230620133711.22840-4-dwagner@suse.de> (raw)
In-Reply-To: <20230620133711.22840-1-dwagner@suse.de>

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 4b35bdcac185..9f7530147893 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;
 }
 
-- 
2.41.0

