netdev - [PATCH RFC net-next 2/6] net: dsa: sja1105: remove interface checks

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Date:   Thu, 24 Feb 2022 16:15:21 +0000
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Marek Beh__n <kabel@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH RFC net-next 2/6] net: dsa: sja1105: remove interface checks

When the supported interfaces bitmap is populated, phylink will itself
check that the interface mode is present in this bitmap. Drivers no
longer need to perform this check themselves. Remove these checks.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/dsa/sja1105/sja1105_main.c | 29 --------------------------
 1 file changed, 29 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 90e73a982faf..e278bd86e3c6 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -1358,19 +1358,6 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	return sja1105_clocking_setup_port(priv, port);
 }
 
-/* The SJA1105 MAC programming model is through the static config (the xMII
- * Mode table cannot be dynamically reconfigured), and we have to program
- * that early (earlier than PHYLINK calls us, anyway).
- * So just error out in case the connected PHY attempts to change the initial
- * system interface MII protocol from what is defined in the DT, at least for
- * now.
- */
-static bool sja1105_phy_mode_mismatch(struct sja1105_private *priv, int port,
-				      phy_interface_t interface)
-{
-	return priv->phy_mode[port] != interface;
-}
-
 static void sja1105_mac_config(struct dsa_switch *ds, int port,
 			       unsigned int mode,
 			       const struct phylink_link_state *state)
@@ -1379,12 +1366,6 @@ static void sja1105_mac_config(struct dsa_switch *ds, int port,
 	struct sja1105_private *priv = ds->priv;
 	struct dw_xpcs *xpcs;
 
-	if (sja1105_phy_mode_mismatch(priv, port, state->interface)) {
-		dev_err(ds->dev, "Changing PHY mode to %s not supported!\n",
-			phy_modes(state->interface));
-		return;
-	}
-
 	xpcs = priv->xpcs[port];
 
 	if (xpcs)
@@ -1438,16 +1419,6 @@ static void sja1105_phylink_validate(struct dsa_switch *ds, int port,
 
 	mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
 
-	/* include/linux/phylink.h says:
-	 *     When @state->interface is %PHY_INTERFACE_MODE_NA, phylink
-	 *     expects the MAC driver to return all supported link modes.
-	 */
-	if (state->interface != PHY_INTERFACE_MODE_NA &&
-	    sja1105_phy_mode_mismatch(priv, port, state->interface)) {
-		linkmode_zero(supported);
-		return;
-	}
-
 	/* The MAC does not support pause frames, and also doesn't
 	 * support half-duplex traffic modes.
 	 */
-- 
2.30.2