Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Ioana Ciornei <ioana.ciornei@nxp.com>
To:     gregkh@linuxfoundation.org
Cc:     linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
        Ioana Ciornei <ioana.ciornei@nxp.com>
Subject: [PATCH 1/6] staging: dpaa2-ethsw: fix reported link state
Date:   Tue, 14 Jul 2020 16:34:26 +0300
Message-Id: <20200714133431.17532-2-ioana.ciornei@nxp.com>
In-Reply-To: <20200714133431.17532-1-ioana.ciornei@nxp.com>
References: <20200714133431.17532-1-ioana.ciornei@nxp.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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 <ioana.ciornei@nxp.com>
---
 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