kernel: remove support for kernel 4.19

We use 5.4 on all targets by default, and 4.19 has never been released
in a stable version. There is no reason to keep it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 141 deletions

diff --git a/target/linux/generic/backport-4.19/715-v5.3-net-phylink-don-t-start-and-stop-SGMII-PHYs-in-SFP-m.patch b/target/linux/generic/backport-4.19/715-v5.3-net-phylink-don-t-start-and-stop-SGMII-PHYs-in-SFP-m.patch
deleted file mode 100644
index 94fb2fb3e4..0000000000
--- a/target/linux/generic/backport-4.19/715-v5.3-net-phylink-don-t-start-and-stop-SGMII-PHYs-in-SFP-m.patch
+++ /dev/null
@@ -1,141 +0,0 @@
-From b8803113537a1c1f457eba6270d46e3af305031f Mon Sep 17 00:00:00 2001
-From: Arseny Solokha <asolokha@kb.kras.ru>
-Date: Wed, 24 Jul 2019 20:31:39 +0700
-Subject: [PATCH 613/660] net: phylink: don't start and stop SGMII PHYs in SFP
- modules twice
-
-SFP modules connected using the SGMII interface have their own PHYs which
-are handled by the struct phylink's phydev field. On the other hand, for
-the modules connected using 1000Base-X interface that field is not set.
-
-Since commit ce0aa27ff3f6 ("sfp: add sfp-bus to bridge between network
-devices and sfp cages") phylink_start() ends up setting the phydev field
-using the sfp-bus infrastructure, which eventually calls phy_start() on it,
-and then calling phy_start() again on the same phydev from phylink_start()
-itself. Similar call sequence holds for phylink_stop(), only in the reverse
-order. This results in WARNs during network interface bringup and shutdown
-when a copper SFP module is connected, as phy_start() and phy_stop() are
-called twice in a row for the same phy_device:
-
-  % ip link set up dev eth0
-  ------------[ cut here ]------------
-  called from state UP
-  WARNING: CPU: 1 PID: 155 at drivers/net/phy/phy.c:895 phy_start+0x74/0xc0
-  Modules linked in:
-  CPU: 1 PID: 155 Comm: backend Not tainted 5.2.0+ #1
-  NIP:  c0227bf0 LR: c0227bf0 CTR: c004d224
-  REGS: df547720 TRAP: 0700   Not tainted  (5.2.0+)
-  MSR:  00029000 <CE,EE,ME>  CR: 24002822  XER: 00000000
-
-  GPR00: c0227bf0 df5477d8 df5d7080 00000014 df9d2370 df9d5ac4 1f4eb000 00000001
-  GPR08: c061fe58 00000000 00000000 df5477d8 0000003c 100c8768 00000000 00000000
-  GPR16: df486a00 c046f1c8 c046eea0 00000000 c046e904 c0239604 db68449c 00000000
-  GPR24: e9083204 00000000 00000001 db684460 e9083404 00000000 db6dce00 db6dcc00
-  NIP [c0227bf0] phy_start+0x74/0xc0
-  LR [c0227bf0] phy_start+0x74/0xc0
-  Call Trace:
-  [df5477d8] [c0227bf0] phy_start+0x74/0xc0 (unreliable)
-  [df5477e8] [c023cad0] startup_gfar+0x398/0x3f4
-  [df547828] [c023cf08] gfar_enet_open+0x364/0x374
-  [df547898] [c029d870] __dev_open+0xe4/0x140
-  [df5478c8] [c029db70] __dev_change_flags+0xf0/0x188
-  [df5478f8] [c029dc28] dev_change_flags+0x20/0x54
-  [df547918] [c02ae304] do_setlink+0x310/0x818
-  [df547a08] [c02b1eb8] __rtnl_newlink+0x384/0x6b0
-  [df547c28] [c02b222c] rtnl_newlink+0x48/0x68
-  [df547c48] [c02ad7c8] rtnetlink_rcv_msg+0x240/0x27c
-  [df547c98] [c02cc068] netlink_rcv_skb+0x8c/0xf0
-  [df547cd8] [c02cba3c] netlink_unicast+0x114/0x19c
-  [df547d08] [c02cbd74] netlink_sendmsg+0x2b0/0x2c0
-  [df547d58] [c027b668] sock_sendmsg_nosec+0x20/0x40
-  [df547d68] [c027d080] ___sys_sendmsg+0x17c/0x1dc
-  [df547e98] [c027df7c] __sys_sendmsg+0x68/0x84
-  [df547ef8] [c027e430] sys_socketcall+0x1a0/0x204
-  [df547f38] [c000d1d8] ret_from_syscall+0x0/0x38
-  --- interrupt: c01 at 0xfd4e030
-      LR = 0xfd4e010
-  Instruction dump:
-  813f0188 38800000 2b890005 419d0014 3d40c046 5529103a 394aa208 7c8a482e
-  3c60c046 3863a1b8 4cc63182 4be009a1 <0fe00000> 48000030 3c60c046 3863a1d0
-  ---[ end trace d4c095aeaf6ea998 ]---
-
-and
-
-  % ip link set down dev eth0
-  ------------[ cut here ]------------
-  called from state HALTED
-  WARNING: CPU: 1 PID: 184 at drivers/net/phy/phy.c:858 phy_stop+0x3c/0x88
-
-  <...>
-
-  Call Trace:
-  [df581788] [c0228450] phy_stop+0x3c/0x88 (unreliable)
-  [df581798] [c022d548] sfp_sm_phy_detach+0x1c/0x44
-  [df5817a8] [c022e8cc] sfp_sm_event+0x4b0/0x87c
-  [df581848] [c022f04c] sfp_upstream_stop+0x34/0x44
-  [df581858] [c0225608] phylink_stop+0x7c/0xe4
-  [df581868] [c023c57c] stop_gfar+0x7c/0x94
-  [df581888] [c023c5b8] gfar_close+0x24/0x94
-  [df5818a8] [c0298688] __dev_close_many+0xdc/0xf8
-  [df5818c8] [c029db58] __dev_change_flags+0xd8/0x188
-  [df5818f8] [c029dc28] dev_change_flags+0x20/0x54
-  [df581918] [c02ae304] do_setlink+0x310/0x818
-  [df581a08] [c02b1eb8] __rtnl_newlink+0x384/0x6b0
-  [df581c28] [c02b222c] rtnl_newlink+0x48/0x68
-  [df581c48] [c02ad7c8] rtnetlink_rcv_msg+0x240/0x27c
-  [df581c98] [c02cc068] netlink_rcv_skb+0x8c/0xf0
-  [df581cd8] [c02cba3c] netlink_unicast+0x114/0x19c
-  [df581d08] [c02cbd74] netlink_sendmsg+0x2b0/0x2c0
-  [df581d58] [c027b668] sock_sendmsg_nosec+0x20/0x40
-  [df581d68] [c027d080] ___sys_sendmsg+0x17c/0x1dc
-  [df581e98] [c027df7c] __sys_sendmsg+0x68/0x84
-  [df581ef8] [c027e430] sys_socketcall+0x1a0/0x204
-  [df581f38] [c000d1d8] ret_from_syscall+0x0/0x38
-
-  <...>
-
-  ---[ end trace d4c095aeaf6ea999 ]---
-
-SFP modules with the 1000Base-X interface are not affected.
-
-Place explicit calls to phy_start() and phy_stop() before enabling or after
-disabling an attached SFP module, where phydev is not yet set (or is
-already unset), so they will be made only from the inside of sfp-bus, if
-needed.
-
-Fixes: 217962615662 ("net: phy: warn if phy_start is called from invalid state")
-Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru>
-Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- drivers/net/phy/phylink.c | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
---- a/drivers/net/phy/phylink.c
-+++ b/drivers/net/phy/phylink.c
-@@ -973,10 +973,10 @@ void phylink_start(struct phylink *pl)
- 	}
- 	if (pl->link_an_mode == MLO_AN_FIXED && pl->get_fixed_state)
- 		mod_timer(&pl->link_poll, jiffies + HZ);
--	if (pl->sfp_bus)
--		sfp_upstream_start(pl->sfp_bus);
- 	if (pl->phydev)
- 		phy_start(pl->phydev);
-+	if (pl->sfp_bus)
-+		sfp_upstream_start(pl->sfp_bus);
- }
- EXPORT_SYMBOL_GPL(phylink_start);
- 
-@@ -993,10 +993,10 @@ void phylink_stop(struct phylink *pl)
- {
- 	ASSERT_RTNL();
- 
--	if (pl->phydev)
--		phy_stop(pl->phydev);
- 	if (pl->sfp_bus)
- 		sfp_upstream_stop(pl->sfp_bus);
-+	if (pl->phydev)
-+		phy_stop(pl->phydev);
- 	del_timer_sync(&pl->link_poll);
- 	if (pl->link_irq) {
- 		free_irq(pl->link_irq, pl);