netdev - [PATCH RFC net-next] net: phylink: remove phylink_set

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Message-Id: <E1nNdx6-00Asv3-C7@rmk-PC.armlinux.org.uk>
Date:   Fri, 25 Feb 2022 17:00:20 +0000
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH RFC net-next] net: phylink: remove phylink_set_pcs()

As all users of phylink_set_pcs() have now been updated to use the
mac_select_pcs() method, it can be removed from the phylink kernel
API and its functionality moved into phylink_major_config().

Removing phylink_set_pcs() gives us a single approach for attaching
a PCS  within phylink.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
As mentioned in a reply to the ocelot patch series, once that series
is merged, we can then get rid of phylink_set_pcs() - and this patch
takes the simple approach of merely moving the code to the one
remaining callsite in phylink_major_config().

I am intending to send this once the Ocelot series has been merged,
which may be over the weekend, which I don't believe will be an
issue for this patch.

 drivers/net/phy/phylink.c | 44 +++++++++++----------------------------
 include/linux/phylink.h   |  1 -
 2 files changed, 12 insertions(+), 33 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 28aa23533107..8d1cd2b9ba5f 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -815,8 +815,18 @@ static void phylink_major_config(struct phylink *pl, bool restart,
 	/* If we have a new PCS, switch to the new PCS after preparing the MAC
 	 * for the change.
 	 */
-	if (pcs)
-		phylink_set_pcs(pl, pcs);
+	if (pcs) {
+		pl->pcs = pcs;
+		pl->pcs_ops = pcs->ops;
+
+		if (!pl->phylink_disable_state &&
+		    pl->cfg_link_an_mode == MLO_AN_INBAND) {
+			if (pcs->poll)
+				mod_timer(&pl->link_poll, jiffies + HZ);
+			else
+				del_timer(&pl->link_poll);
+		}
+	}
 
 	phylink_mac_config(pl, state);
 
@@ -1286,36 +1296,6 @@ struct phylink *phylink_create(struct phylink_config *config,
 }
 EXPORT_SYMBOL_GPL(phylink_create);
 
-/**
- * phylink_set_pcs() - set the current PCS for phylink to use
- * @pl: a pointer to a &struct phylink returned from phylink_create()
- * @pcs: a pointer to the &struct phylink_pcs
- *
- * Bind the MAC PCS to phylink.  This may be called after phylink_create().
- * If it is desired to dynamically change the PCS, then the preferred method
- * is to use mac_select_pcs(), but it may also be called in mac_prepare()
- * or mac_config().
- *
- * Please note that there are behavioural changes with the mac_config()
- * callback if a PCS is present (denoting a newer setup) so removing a PCS
- * is not supported, and if a PCS is going to be used, it must be registered
- * by calling phylink_set_pcs() at the latest in the first mac_config() call.
- */
-void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs)
-{
-	pl->pcs = pcs;
-	pl->pcs_ops = pcs->ops;
-
-	if (!pl->phylink_disable_state &&
-	    pl->cfg_link_an_mode == MLO_AN_INBAND) {
-		if (pcs->poll)
-			mod_timer(&pl->link_poll, jiffies + HZ);
-		else
-			del_timer(&pl->link_poll);
-	}
-}
-EXPORT_SYMBOL_GPL(phylink_set_pcs);
-
 /**
  * phylink_destroy() - cleanup and destroy the phylink instance
  * @pl: a pointer to a &struct phylink returned from phylink_create()
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index 9ef9b7047f19..223781622b33 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -532,7 +532,6 @@ void phylink_generic_validate(struct phylink_config *config,
 struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
 			       phy_interface_t iface,
 			       const struct phylink_mac_ops *mac_ops);
-void phylink_set_pcs(struct phylink *, struct phylink_pcs *pcs);
 void phylink_destroy(struct phylink *);
 
 int phylink_connect_phy(struct phylink *, struct phy_device *);
-- 
2.30.2