When "enhanced IPoIB" enabled for CX-5 devices, it requires the parent device to be UP, otherwise the child devices won't work.[1] This add a debug message to give admin a hint, if only child interface is UP, but parent interface is not. [1]https://lore.kernel.org/linux-rdma/CAMGffE=3YYxv9i7_qQr3-Uv-NGr-7VsnMk8DTjR0YbX1vJBzXQ@xxxxxxxxxxxxxx/T/#u Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx> --- drivers/infiniband/ulp/ipoib/ipoib_main.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index e16b40c09f82..782b792985b8 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -164,8 +164,12 @@ int ipoib_open(struct net_device *dev) dev_change_flags(cpriv->dev, flags | IFF_UP, NULL); } up_read(&priv->vlan_rwsem); - } + } else if (priv->parent) { + struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent); + if (!test_bit(IPOIB_FLAG_ADMIN_UP, &ppriv->flags)) + ipoib_dbg(priv, "parent deivce %s is not up, so child may be not functioning.\n", ((struct ipoib_dev_priv *) ppriv)->dev->name); + } netif_start_queue(dev); return 0; -- 2.25.1