netdev - [PATCH] enetc: add ioctl() support for PHY-related ops

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Message-Id: <20191107083937.18228-1-michael@walle.cc>
Date:   Thu,  7 Nov 2019 09:39:37 +0100
From:   Michael Walle <michael@...le.cc>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Claudiu Manoil <claudiu.manoil@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH] enetc: add ioctl() support for PHY-related ops

If there is an attached PHY try to handle the requested ioctl with its
handler, which allows the userspace to access PHY registers, for
example. This will make mii-diag and similar tools work.

Signed-off-by: Michael Walle <michael@...le.cc>
---
 drivers/net/ethernet/freescale/enetc/enetc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index b6ff89307409..25af207f1962 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -1599,7 +1599,10 @@ int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 	if (cmd == SIOCGHWTSTAMP)
 		return enetc_hwtstamp_get(ndev, rq);
 #endif
-	return -EINVAL;
+
+	if (!ndev->phydev)
+		return -EINVAL;
+	return phy_mii_ioctl(ndev->phydev, rq, cmd);
 }
 
 int enetc_alloc_msix(struct enetc_ndev_priv *priv)
-- 
2.20.1