Patch "net: phylink: add phylink_expects_phy() method" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    net: phylink: add phylink_expects_phy() method

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-phylink-add-phylink_expects_phy-method.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 11bbc1533099efc1917228397beb8db7d60bc7d5
Author: Michael Sit Wei Hong <michael.wei.hong.sit@xxxxxxxxx>
Date:   Thu Mar 30 17:14:02 2023 +0800

    net: phylink: add phylink_expects_phy() method
    
    [ Upstream commit 653a180957a85c3fc30320cc7e84f5dc913a64f8 ]
    
    Provide phylink_expects_phy() to allow MAC drivers to check if it
    is expecting a PHY to attach to. Since fixed-linked setups do not
    need to attach to a PHY.
    
    Provides a boolean value as to if the MAC should expect a PHY.
    Returns true if a PHY is expected.
    
    Reviewed-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@xxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Stable-dep-of: fe2cfbc96803 ("net: stmmac: check if MAC needs to attach to a PHY")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index a202ce6611fde..4073e8243df3f 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1552,6 +1552,25 @@ void phylink_destroy(struct phylink *pl)
 }
 EXPORT_SYMBOL_GPL(phylink_destroy);
 
+/**
+ * phylink_expects_phy() - Determine if phylink expects a phy to be attached
+ * @pl: a pointer to a &struct phylink returned from phylink_create()
+ *
+ * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X,
+ * no PHY is needed.
+ *
+ * Returns true if phylink will be expecting a PHY.
+ */
+bool phylink_expects_phy(struct phylink *pl)
+{
+	if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
+	    (pl->cfg_link_an_mode == MLO_AN_INBAND &&
+	     phy_interface_mode_is_8023z(pl->link_config.interface)))
+		return false;
+	return true;
+}
+EXPORT_SYMBOL_GPL(phylink_expects_phy);
+
 static void phylink_phy_change(struct phy_device *phydev, bool up)
 {
 	struct phylink *pl = phydev->phylink;
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index 3f01ac8017e06..6d62c9ea2e040 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -566,6 +566,7 @@ struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
 			       phy_interface_t iface,
 			       const struct phylink_mac_ops *mac_ops);
 void phylink_destroy(struct phylink *);
+bool phylink_expects_phy(struct phylink *pl);
 
 int phylink_connect_phy(struct phylink *, struct phy_device *);
 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);



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