linux-kernel - [PATCH net-next 3/3] xen-netback: remove 'hotplug-status' once it has served its purpose

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Message-ID: <20191217133218.27085-4-pdurrant@amazon.com>
Date:   Tue, 17 Dec 2019 13:32:18 +0000
From:   Paul Durrant <pdurrant@...zon.com>
To:     <xen-devel@...ts.xenproject.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Paul Durrant <pdurrant@...zon.com>, Wei Liu <wei.liu@...nel.org>,
        "Paul Durrant" <paul@....org>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH net-next 3/3] xen-netback: remove 'hotplug-status' once it has served its purpose

Removing the 'hotplug-status' node in netback_remove() is wrong; the script
may not have completed. Only remove the node once the watch has fired and
has been unregistered.

Signed-off-by: Paul Durrant <pdurrant@...zon.com>
---
Cc: Wei Liu <wei.liu@...nel.org>
Cc: Paul Durrant <paul@....org>
Cc: "David S. Miller" <davem@...emloft.net>
---
 drivers/net/xen-netback/xenbus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 682e5e20971b..17b4950ec051 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -648,6 +648,7 @@ static void hotplug_status_changed(struct xenbus_watch *watch,
 
 		/* Not interested in this watch anymore. */
 		unregister_hotplug_status_watch(be);
+		xenbus_rm(XBT_NIL, be->dev->nodename, "hotplug-status");
 	}
 	kfree(str);
 }
@@ -959,7 +960,6 @@ static int netback_remove(struct xenbus_device *dev)
 	if (be->vif) {
 		kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
 		xen_unregister_watchers(be->vif);
-		xenbus_rm(XBT_NIL, dev->nodename, "hotplug-status");
 		xenvif_free(be->vif);
 		be->vif = NULL;
 	}
-- 
2.20.1