kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 254 deletions

diff --git a/target/linux/generic/backport-5.4/717-v5.5-net-sfp-rework-upstream-interface.patch b/target/linux/generic/backport-5.4/717-v5.5-net-sfp-rework-upstream-interface.patch
deleted file mode 100644
index 9175f2557a..0000000000
--- a/target/linux/generic/backport-5.4/717-v5.5-net-sfp-rework-upstream-interface.patch
+++ /dev/null
@@ -1,254 +0,0 @@
-From 863b5b6941f9f43b924393b6ba2b36647e7dee42 Mon Sep 17 00:00:00 2001
-From: Russell King <rmk+kernel@armlinux.org.uk>
-Date: Thu, 7 Nov 2019 17:06:08 +0000
-Subject: [PATCH 615/660] net: sfp: rework upstream interface
-
-The current upstream interface is an all-or-nothing, which is
-sub-optimal for future changes, as it doesn't allow the upstream driver
-to prepare for the SFP module becoming available, as it is at boot.
-
-Switch to a find-sfp-bus, add-upstream, del-upstream, put-sfp-bus
-interface structure instead, which allows the upstream driver to
-prepare for a module being available as soon as add-upstream is called.
-
-Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
----
- drivers/net/phy/phylink.c | 10 +++--
- drivers/net/phy/sfp-bus.c | 92 +++++++++++++++++++++++++++------------
- include/linux/sfp.h       | 25 +++++++----
- 3 files changed, 88 insertions(+), 39 deletions(-)
-
---- a/drivers/net/phy/phylink.c
-+++ b/drivers/net/phy/phylink.c
-@@ -568,7 +568,7 @@ static int phylink_register_sfp(struct p
- 	struct sfp_bus *bus;
- 	int ret;
- 
--	bus = sfp_register_upstream_node(fwnode, pl, &sfp_phylink_ops);
-+	bus = sfp_bus_find_fwnode(fwnode);
- 	if (IS_ERR(bus)) {
- 		ret = PTR_ERR(bus);
- 		phylink_err(pl, "unable to attach SFP bus: %d\n", ret);
-@@ -577,7 +577,10 @@ static int phylink_register_sfp(struct p
- 
- 	pl->sfp_bus = bus;
- 
--	return 0;
-+	ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
-+	sfp_bus_put(bus);
-+
-+	return ret;
- }
- 
- /**
-@@ -675,8 +678,7 @@ EXPORT_SYMBOL_GPL(phylink_create);
-  */
- void phylink_destroy(struct phylink *pl)
- {
--	if (pl->sfp_bus)
--		sfp_unregister_upstream(pl->sfp_bus);
-+	sfp_bus_del_upstream(pl->sfp_bus);
- 	if (pl->link_gpio)
- 		gpiod_put(pl->link_gpio);
- 
---- a/drivers/net/phy/sfp-bus.c
-+++ b/drivers/net/phy/sfp-bus.c
-@@ -404,10 +404,19 @@ static void sfp_bus_release(struct kref
- 	kfree(bus);
- }
- 
--static void sfp_bus_put(struct sfp_bus *bus)
-+/**
-+ * sfp_bus_put() - put a reference on the &struct sfp_bus
-+ * bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
-+ *
-+ * Put a reference on the &struct sfp_bus and free the underlying structure
-+ * if this was the last reference.
-+ */
-+void sfp_bus_put(struct sfp_bus *bus)
- {
--	kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
-+	if (bus)
-+		kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
- }
-+EXPORT_SYMBOL_GPL(sfp_bus_put);
- 
- static int sfp_register_bus(struct sfp_bus *bus)
- {
-@@ -423,11 +432,11 @@ static int sfp_register_bus(struct sfp_b
- 				return ret;
- 		}
- 	}
-+	bus->registered = true;
- 	bus->socket_ops->attach(bus->sfp);
- 	if (bus->started)
- 		bus->socket_ops->start(bus->sfp);
- 	bus->upstream_ops->attach(bus->upstream, bus);
--	bus->registered = true;
- 	return 0;
- }
- 
-@@ -521,13 +530,12 @@ static void sfp_upstream_clear(struct sf
- }
- 
- /**
-- * sfp_register_upstream_node() - parse and register the neighbouring device
-+ * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
-  * @fwnode: firmware node for the parent device (MAC or PHY)
-- * @upstream: the upstream private data
-- * @ops: the upstream's &struct sfp_upstream_ops
-  *
-- * Parse the parent device's firmware node for a SFP bus, and register the
-- * SFP bus using sfp_register_upstream().
-+ * Parse the parent device's firmware node for a SFP bus, and locate
-+ * the sfp_bus structure, incrementing its reference count.  This must
-+ * be put via sfp_bus_put() when done.
-  *
-  * Returns: on success, a pointer to the sfp_bus structure,
-  *	    %NULL if no SFP is specified,
-@@ -537,9 +545,7 @@ static void sfp_upstream_clear(struct sf
-  * 	        %-ENOMEM if we failed to allocate the bus.
-  *		an error from the upstream's connect_phy() method.
-  */
--struct sfp_bus *sfp_register_upstream_node(struct fwnode_handle *fwnode,
--					   void *upstream,
--					   const struct sfp_upstream_ops *ops)
-+struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode)
- {
- 	struct fwnode_reference_args ref;
- 	struct sfp_bus *bus;
-@@ -557,7 +563,39 @@ struct sfp_bus *sfp_register_upstream_no
- 	if (!bus)
- 		return ERR_PTR(-ENOMEM);
- 
-+	return bus;
-+}
-+EXPORT_SYMBOL_GPL(sfp_bus_find_fwnode);
-+
-+/**
-+ * sfp_bus_add_upstream() - parse and register the neighbouring device
-+ * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
-+ * @upstream: the upstream private data
-+ * @ops: the upstream's &struct sfp_upstream_ops
-+ *
-+ * Add upstream driver for the SFP bus, and if the bus is complete, register
-+ * the SFP bus using sfp_register_upstream().  This takes a reference on the
-+ * bus, so it is safe to put the bus after this call.
-+ *
-+ * Returns: on success, a pointer to the sfp_bus structure,
-+ *	    %NULL if no SFP is specified,
-+ * 	    on failure, an error pointer value:
-+ * 		corresponding to the errors detailed for
-+ * 		fwnode_property_get_reference_args().
-+ * 	        %-ENOMEM if we failed to allocate the bus.
-+ *		an error from the upstream's connect_phy() method.
-+ */
-+int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
-+			 const struct sfp_upstream_ops *ops)
-+{
-+	int ret;
-+
-+	/* If no bus, return success */
-+	if (!bus)
-+		return 0;
-+
- 	rtnl_lock();
-+	kref_get(&bus->kref);
- 	bus->upstream_ops = ops;
- 	bus->upstream = upstream;
- 
-@@ -570,33 +608,33 @@ struct sfp_bus *sfp_register_upstream_no
- 	}
- 	rtnl_unlock();
- 
--	if (ret) {
-+	if (ret)
- 		sfp_bus_put(bus);
--		bus = ERR_PTR(ret);
--	}
- 
--	return bus;
-+	return ret;
- }
--EXPORT_SYMBOL_GPL(sfp_register_upstream_node);
-+EXPORT_SYMBOL_GPL(sfp_bus_add_upstream);
- 
- /**
-- * sfp_unregister_upstream() - Unregister sfp bus
-+ * sfp_bus_del_upstream() - Delete a sfp bus
-  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
-  *
-- * Unregister a previously registered upstream connection for the SFP
-- * module. @bus is returned from sfp_register_upstream().
-+ * Delete a previously registered upstream connection for the SFP
-+ * module. @bus should have been added by sfp_bus_add_upstream().
-  */
--void sfp_unregister_upstream(struct sfp_bus *bus)
-+void sfp_bus_del_upstream(struct sfp_bus *bus)
- {
--	rtnl_lock();
--	if (bus->sfp)
--		sfp_unregister_bus(bus);
--	sfp_upstream_clear(bus);
--	rtnl_unlock();
-+	if (bus) {
-+		rtnl_lock();
-+		if (bus->sfp)
-+			sfp_unregister_bus(bus);
-+		sfp_upstream_clear(bus);
-+		rtnl_unlock();
- 
--	sfp_bus_put(bus);
-+		sfp_bus_put(bus);
-+	}
- }
--EXPORT_SYMBOL_GPL(sfp_unregister_upstream);
-+EXPORT_SYMBOL_GPL(sfp_bus_del_upstream);
- 
- /* Socket driver entry points */
- int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
---- a/include/linux/sfp.h
-+++ b/include/linux/sfp.h
-@@ -508,10 +508,11 @@ int sfp_get_module_eeprom(struct sfp_bus
- 			  u8 *data);
- void sfp_upstream_start(struct sfp_bus *bus);
- void sfp_upstream_stop(struct sfp_bus *bus);
--struct sfp_bus *sfp_register_upstream_node(struct fwnode_handle *fwnode,
--					   void *upstream,
--					   const struct sfp_upstream_ops *ops);
--void sfp_unregister_upstream(struct sfp_bus *bus);
-+void sfp_bus_put(struct sfp_bus *bus);
-+struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode);
-+int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
-+			 const struct sfp_upstream_ops *ops);
-+void sfp_bus_del_upstream(struct sfp_bus *bus);
- #else
- static inline int sfp_parse_port(struct sfp_bus *bus,
- 				 const struct sfp_eeprom_id *id,
-@@ -553,14 +554,22 @@ static inline void sfp_upstream_stop(str
- {
- }
- 
--static inline struct sfp_bus *sfp_register_upstream_node(
--	struct fwnode_handle *fwnode, void *upstream,
--	const struct sfp_upstream_ops *ops)
-+static inline void sfp_bus_put(struct sfp_bus *bus)
-+{
-+}
-+
-+static inline struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode)
- {
- 	return NULL;
- }
- 
--static inline void sfp_unregister_upstream(struct sfp_bus *bus)
-+static int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
-+				const struct sfp_upstream_ops *ops)
-+{
-+	return 0;
-+}
-+
-+static inline void sfp_bus_del_upstream(struct sfp_bus *bus)
- {
- }
- #endif