From b18e5e86b44be0dca399d8e2383f97c8077392ce Mon Sep 17 00:00:00 2001 From: Thomas Tai Date: Mon, 15 May 2017 10:51:07 -0700 Subject: ldmvsw: unregistering netdev before disable hardware When running LDom binding/unbinding test, kernel may panic in ldmvsw_open(). It is more likely that because we're removing the ldc connection before unregistering the netdev in vsw_port_remove(), we set up a window of time where one process could be removing the device while another trying to UP the device. This also sometimes causes vio handshake error due to opening a device without closing it completely. We should unregister the netdev before we disable the "hardware". Orabug: 25980913, 25925306 Signed-off-by: Thomas Tai Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- drivers/net/ethernet/sun/ldmvsw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 5a90fed06260..309747c7b8ae 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -413,6 +413,7 @@ static int vsw_port_remove(struct vio_dev *vdev) del_timer_sync(&port->vio.timer); napi_disable(&port->napi); + unregister_netdev(port->dev); list_del_rcu(&port->list); @@ -427,7 +428,6 @@ static int vsw_port_remove(struct vio_dev *vdev) dev_set_drvdata(&vdev->dev, NULL); - unregister_netdev(port->dev); free_netdev(port->dev); } -- cgit v1.2.3 From 8b671f906c2debc4f2393438c4e7668936522e99 Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Mon, 15 May 2017 10:51:08 -0700 Subject: ldmvsw: stop the clean timer at beginning of remove Stop the clean timer earlier to be sure there's no asynchronous interference while stopping the port. Orabug: 25748241 Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- drivers/net/ethernet/sun/ldmvsw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 309747c7b8ae..5b56c24b6ed2 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -411,6 +411,7 @@ static int vsw_port_remove(struct vio_dev *vdev) if (port) { del_timer_sync(&port->vio.timer); + del_timer_sync(&port->clean_timer); napi_disable(&port->napi); unregister_netdev(port->dev); @@ -418,7 +419,6 @@ static int vsw_port_remove(struct vio_dev *vdev) list_del_rcu(&port->list); synchronize_rcu(); - del_timer_sync(&port->clean_timer); spin_lock_irqsave(&port->vp->lock, flags); sunvnet_port_rm_txq_common(port); spin_unlock_irqrestore(&port->vp->lock, flags); -- cgit v1.2.3