Received-SPF: pass (google.com: domain of linux-kernel+bounces-134471-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99;
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Justin Tee <justin.tee@broadcom.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	Sasha Levin <sashal@kernel.org>,
	james.smart@broadcom.com,
	dick.kennedy@broadcom.com,
	jejb@linux.ibm.com,
	linux-scsi@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 01/10] scsi: lpfc: Move NPIV's transport unregistration to after resource clean up
Date: Sun,  7 Apr 2024 09:13:31 -0400
Message-ID: <20240407131341.1052960-1-sashal@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Justin Tee <justin.tee@broadcom.com>

[ Upstream commit 4ddf01f2f1504fa08b766e8cfeec558e9f8eef6c ]

There are cases after NPIV deletion where the fabric switch still believes
the NPIV is logged into the fabric.  This occurs when a vport is
unregistered before the Remove All DA_ID CT and LOGO ELS are sent to the
fabric.

Currently fc_remove_host(), which calls dev_loss_tmo for all D_IDs including
the fabric D_ID, removes the last ndlp reference and frees the ndlp rport
object.  This sometimes causes the race condition where the final DA_ID and
LOGO are skipped from being sent to the fabric switch.

Fix by moving the fc_remove_host() and scsi_remove_host() calls after DA_ID
and LOGO are sent.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20240305200503.57317-3-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/lpfc/lpfc_vport.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index da9a1f72d9383..b1071226e27fb 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -651,10 +651,6 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
 	lpfc_free_sysfs_attr(vport);
 	lpfc_debugfs_terminate(vport);
 
-	/* Remove FC host to break driver binding. */
-	fc_remove_host(shost);
-	scsi_remove_host(shost);
-
 	/* Send the DA_ID and Fabric LOGO to cleanup Nameserver entries. */
 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
 	if (!ndlp)
@@ -700,6 +696,10 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
 
 skip_logo:
 
+	/* Remove FC host to break driver binding. */
+	fc_remove_host(shost);
+	scsi_remove_host(shost);
+
 	lpfc_cleanup(vport);
 
 	/* Remove scsi host now.  The nodes are cleaned up. */
-- 
2.43.0