2020-07-14 13:36:30

by Ioana Ciornei

[permalink] [raw]
Subject: [PATCH 1/6] staging: dpaa2-ethsw: fix reported link state

On the .ndo_open() callback set netif_carrier_off() until the link state
interrupt is received so that the LOWER_UP flag does not show up
incorrectly in the output of 'ip link show'.

Signed-off-by: Ioana Ciornei <[email protected]>
---
drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
index 546ad376df99..46aa37093e86 100644
--- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
+++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
@@ -473,6 +473,13 @@ static int port_open(struct net_device *netdev)
/* No need to allow Tx as control interface is disabled */
netif_tx_stop_all_queues(netdev);

+ /* Explicitly set carrier off, otherwise
+ * netif_carrier_ok() will return true and cause 'ip link show'
+ * to report the LOWER_UP flag, even though the link
+ * notification wasn't even received.
+ */
+ netif_carrier_off(netdev);
+
err = dpsw_if_enable(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx);
--
2.25.1