[PATCH net-next] net: stmmac: Simplify ioctl handling

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

Now that timestamping is controlled through an NDO, we can simply
call phylink_mii_ioctl() to handle ioctls.

The only functional difference is that phylink_mii_ioctl() ->
phy_mii_ioctl() can handle SIOCSHWTSTAMP, but this no longer happens
as this ioctl is not longer dispatched to the ndo_eth_ioctl().

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---

Looking at this, I'm wondering if we can't just get rid of SIOCSHWTSTAMP
handling in phy_mii_ioctl(). Looks like we can ?

 .../net/ethernet/stmicro/stmmac/stmmac_main.c   | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 2a0d7eff88d3..562d20830b94 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -6371,28 +6371,17 @@ static irqreturn_t stmmac_msi_intr_rx(int irq, void *data)
  *  @rq: An IOCTL specific structure, that can contain a pointer to
  *  a proprietary structure used to pass information to the driver.
  *  @cmd: IOCTL command
- *  Description:
- *  Currently it supports the phy_mii_ioctl(...) and HW time stamping.
+ *  Description: Forward the PHY ioctls to phylink
+ *  Return: Zero on success or negative error code.
  */
 static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
 	struct stmmac_priv *priv = netdev_priv (dev);
-	int ret = -EOPNOTSUPP;
 
 	if (!netif_running(dev))
 		return -EINVAL;
 
-	switch (cmd) {
-	case SIOCGMIIPHY:
-	case SIOCGMIIREG:
-	case SIOCSMIIREG:
-		ret = phylink_mii_ioctl(priv->phylink, rq, cmd);
-		break;
-	default:
-		break;
-	}
-
-	return ret;
+	return phylink_mii_ioctl(priv->phylink, rq, cmd);
 }
 
 static int stmmac_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
-- 
2.55.0