netdev - [RFC PATCH net-next 3/8] net: pcs: xpcs: export xpcs

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Message-Id: <20210527204528.3490126-4-olteanv@gmail.com>
Date:   Thu, 27 May 2021 23:45:23 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [RFC PATCH net-next 3/8] net: pcs: xpcs: export xpcs_validate

From: Vladimir Oltean <vladimir.oltean@....com>

Calling a function pointer with a single implementation through
struct mdio_xpcs_ops is clunky, and the stmmac_do_callback system forces
this to return int, even though it always returns zero.

Simply remove the "validate" function pointer from struct mdio_xpcs_ops
and replace it with an exported xpcs_validate symbol which is called
directly by stmmac.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/stmicro/stmmac/hwif.h        |  2 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  2 +-
 drivers/net/pcs/pcs-xpcs.c                        | 10 ++++------
 include/linux/pcs/pcs-xpcs.h                      |  5 ++---
 4 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 75a8b90c202a..a86b358feae9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -613,8 +613,6 @@ struct stmmac_mmc_ops {
 	stmmac_do_void_callback(__priv, mmc, read, __args)
 
 /* XPCS callbacks */
-#define stmmac_xpcs_validate(__priv, __args...) \
-	stmmac_do_callback(__priv, xpcs, validate, __args)
 #define stmmac_xpcs_config(__priv, __args...) \
 	stmmac_do_callback(__priv, xpcs, config, __args)
 #define stmmac_xpcs_get_state(__priv, __args...) \
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index bf9fe25fed69..d3d85d36e177 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -996,7 +996,7 @@ static void stmmac_validate(struct phylink_config *config,
 	linkmode_andnot(state->advertising, state->advertising, mask);
 
 	/* If PCS is supported, check which modes it supports. */
-	stmmac_xpcs_validate(priv, &priv->hw->xpcs_args, supported, state);
+	xpcs_validate(&priv->hw->xpcs_args, supported, state);
 }
 
 static void stmmac_mac_pcs_get_state(struct phylink_config *config,
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 71efd5ef69e5..4c0093473470 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -658,9 +658,8 @@ static void xpcs_resolve_pma(struct mdio_xpcs_args *xpcs,
 	}
 }
 
-static int xpcs_validate(struct mdio_xpcs_args *xpcs,
-			 unsigned long *supported,
-			 struct phylink_link_state *state)
+void xpcs_validate(struct mdio_xpcs_args *xpcs, unsigned long *supported,
+		   struct phylink_link_state *state)
 {
 	bool valid_interface;
 
@@ -683,13 +682,13 @@ static int xpcs_validate(struct mdio_xpcs_args *xpcs,
 
 	if (!valid_interface) {
 		bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
-		return 0;
+		return;
 	}
 
 	linkmode_and(supported, supported, xpcs->supported);
 	linkmode_and(state->advertising, state->advertising, xpcs->supported);
-	return 0;
 }
+EXPORT_SYMBOL_GPL(xpcs_validate);
 
 static int xpcs_config_eee(struct mdio_xpcs_args *xpcs, int mult_fact_100ns,
 			   int enable)
@@ -958,7 +957,6 @@ static int xpcs_probe(struct mdio_xpcs_args *xpcs)
 }
 
 static struct mdio_xpcs_ops xpcs_ops = {
-	.validate = xpcs_validate,
 	.config = xpcs_config,
 	.get_state = xpcs_get_state,
 	.link_up = xpcs_link_up,
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h
index e48636a1a078..56755b7895a0 100644
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -25,9 +25,6 @@ struct mdio_xpcs_args {
 };
 
 struct mdio_xpcs_ops {
-	int (*validate)(struct mdio_xpcs_args *xpcs,
-			unsigned long *supported,
-			struct phylink_link_state *state);
 	int (*config)(struct mdio_xpcs_args *xpcs,
 		      const struct phylink_link_state *state);
 	int (*get_state)(struct mdio_xpcs_args *xpcs,
@@ -40,5 +37,7 @@ struct mdio_xpcs_ops {
 };
 
 struct mdio_xpcs_ops *mdio_xpcs_get_ops(void);
+void xpcs_validate(struct mdio_xpcs_args *xpcs, unsigned long *supported,
+		   struct phylink_link_state *state);
 
 #endif /* __LINUX_PCS_XPCS_H */
-- 
2.25.1