net: pcs: xpcs: export xpcs_validate

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.

priv->hw->xpcs is of the type "const struct mdio_xpcs_ops *" and is used
as a placeholder/synonym for priv->plat->mdio_bus_data->has_xpcs. It is
done that way because the mdio_bus_data pointer might or might not be
populated in all stmmac instantiations.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index dbafedb..441985f 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -614,8 +614,6 @@ 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 c96a89f..b7e6ab0 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -996,7 +996,8 @@ 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);
+       if (priv->hw->xpcs)
+               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 610073c..2f7791b 100644 (file)
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -685,9 +685,8 @@ 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)
 {
        __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported);
        const struct xpcs_compat *compat;
@@ -698,7 +697,7 @@ static int xpcs_validate(struct mdio_xpcs_args *xpcs,
         * advertising masks and exit.
         */
        if (state->interface == PHY_INTERFACE_MODE_NA)
-               return 0;
+               return;
 
        bitmap_zero(xpcs_supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
 
@@ -713,9 +712,8 @@ static int xpcs_validate(struct mdio_xpcs_args *xpcs,
 
        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)
@@ -1031,7 +1029,6 @@ static int xpcs_probe(struct mdio_xpcs_args *xpcs, phy_interface_t interface)
 }
 
 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 c2ec440..5ec9aac 100644 (file)
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -23,9 +23,6 @@ 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,
@@ -39,5 +36,7 @@ struct mdio_xpcs_ops {
 
 int xpcs_get_an_mode(struct mdio_xpcs_args *xpcs, phy_interface_t interface);
 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 */