meta-agl-core: Remove old kernel support

Remove the linux-agl include files and associated patches that were
used to support 4.14 and 4.19 kernels.  There should be no impact
since no currently supported BSP layer uses them, 4.14 is EOL, and
4.19 goes EOL at the end of 2024.

Bug-AGL: SPEC-5147

Change-Id: I6146e90e0eb0aac85fcd967c58c96f4af4f79c49
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

4 files changed, 0 insertions, 111 deletions

diff --git a/meta-agl-core/recipes-kernel/linux/linux-4.14/net-sch_generic-add-if_afp.h-header-to-get-ARPHRD_CA.patch b/meta-agl-core/recipes-kernel/linux/linux-4.14/net-sch_generic-add-if_afp.h-header-to-get-ARPHRD_CA.patch
deleted file mode 100644
index 7c34fb306..000000000
--- a/meta-agl-core/recipes-kernel/linux/linux-4.14/net-sch_generic-add-if_afp.h-header-to-get-ARPHRD_CA.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From 17d0075d95b5087d5df553444cca390fa479bad9 Mon Sep 17 00:00:00 2001
-From: Matt Ranostay <matt.ranostay@konsulko.com>
-Date: Tue, 10 Mar 2020 22:27:28 -0700
-Subject: [PATCH] net: sch_generic: add if_afp.h header to get ARPHRD_CAN macro
-
-Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
----
- net/sched/sch_generic.c | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
-index bf8c81e07c70..1845ef8c7dbd 100644
---- a/net/sched/sch_generic.c
-+++ b/net/sched/sch_generic.c
-@@ -25,6 +25,7 @@
- #include <linux/rcupdate.h>
- #include <linux/list.h>
- #include <linux/slab.h>
-+#include <linux/if_arp.h>
- #include <linux/if_vlan.h>
- #include <net/sch_generic.h>
- #include <net/pkt_sched.h>
--- 
-2.25.0
-
diff --git a/meta-agl-core/recipes-kernel/linux/linux-agl-4.14.inc b/meta-agl-core/recipes-kernel/linux/linux-agl-4.14.inc
deleted file mode 100644
index 9ab3d34af..000000000
--- a/meta-agl-core/recipes-kernel/linux/linux-agl-4.14.inc
+++ /dev/null
@@ -1,6 +0,0 @@
-FILESEXTRAPATHS:prepend := "${THISDIR}/linux-4.14:"
-
-SRC_URI:append = "\
-       file://net-sch_generic-add-if_afp.h-header-to-get-ARPHRD_CA.patch \
-       file://net-sch_generic-Use-pfifo_fast-as-fallback-scheduler.patch \
-       "
diff --git a/meta-agl-core/recipes-kernel/linux/linux-agl-4.19.inc b/meta-agl-core/recipes-kernel/linux/linux-agl-4.19.inc
deleted file mode 100644
index 1ea476426..000000000
--- a/meta-agl-core/recipes-kernel/linux/linux-agl-4.19.inc
+++ /dev/null
@@ -1,5 +0,0 @@
-FILESEXTRAPATHS:prepend := "${THISDIR}/linux-4.19:"
-
-SRC_URI:append = "\
-       file://net-sch_generic-Use-pfifo_fast-as-fallback-scheduler.patch \
-       "
diff --git a/meta-agl-core/recipes-kernel/linux/linux/net-sch_generic-Use-pfifo_fast-as-fallback-scheduler.patch b/meta-agl-core/recipes-kernel/linux/linux/net-sch_generic-Use-pfifo_fast-as-fallback-scheduler.patch
deleted file mode 100644
index 37ace5a58..000000000
--- a/meta-agl-core/recipes-kernel/linux/linux/net-sch_generic-Use-pfifo_fast-as-fallback-scheduler.patch
+++ /dev/null
@@ -1,75 +0,0 @@
-From 546b85bb0aadb5a928b49b53dc02911996169c0b Mon Sep 17 00:00:00 2001
-From: Vincent Prince <vincent.prince.fr@gmail.com>
-Date: Wed, 23 Oct 2019 15:44:20 +0200
-Subject: [PATCH] net: sch_generic: Use pfifo_fast as fallback scheduler for
- CAN hardware
-
-There is networking hardware that isn't based on Ethernet for layers 1 and 2.
-
-For example CAN.
-
-CAN is a multi-master serial bus standard for connecting Electronic Control
-Units [ECUs] also known as nodes. A frame on the CAN bus carries up to 8 bytes
-of payload. Frame corruption is detected by a CRC. However frame loss due to
-corruption is possible, but a quite unusual phenomenon.
-
-While fq_codel works great for TCP/IP, it doesn't for CAN. There are a lot of
-legacy protocols on top of CAN, which are not build with flow control or high
-CAN frame drop rates in mind.
-
-When using fq_codel, as soon as the queue reaches a certain delay based length,
-skbs from the head of the queue are silently dropped. Silently meaning that the
-user space using a send() or similar syscall doesn't get an error. However
-TCP's flow control algorithm will detect dropped packages and adjust the
-bandwidth accordingly.
-
-When using fq_codel and sending raw frames over CAN, which is the common use
-case, the user space thinks the package has been sent without problems, because
-send() returned without an error. pfifo_fast will drop skbs, if the queue
-length exceeds the maximum. But with this scheduler the skbs at the tail are
-dropped, an error (-ENOBUFS) is propagated to user space. So that the user
-space can slow down the package generation.
-
-On distributions, where fq_codel is made default via CONFIG_DEFAULT_NET_SCH
-during compile time, or set default during runtime with sysctl
-net.core.default_qdisc (see [1]), we get a bad user experience. In my test case
-with pfifo_fast, I can transfer thousands of million CAN frames without a frame
-drop. On the other hand with fq_codel there is more then one lost CAN frame per
-thousand frames.
-
-As pointed out fq_codel is not suited for CAN hardware, so this patch changes
-attach_one_default_qdisc() to use pfifo_fast for "ARPHRD_CAN" network devices.
-
-During transition of a netdev from down to up state the default queuing
-discipline is attached by attach_default_qdiscs() with the help of
-attach_one_default_qdisc(). This patch modifies attach_one_default_qdisc() to
-attach the pfifo_fast (pfifo_fast_ops) if the network device type is
-"ARPHRD_CAN".
-
-[1] https://github.com/systemd/systemd/issues/9194
-
-Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
-Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
-Signed-off-by: Vincent Prince <vincent.prince.fr@gmail.com>
-Acked-by: Dave Taht <dave.taht@gmail.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- net/sched/sch_generic.c | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
-index ed5b0e9fd395..4c5dfcb01e00 100644
---- a/net/sched/sch_generic.c
-+++ b/net/sched/sch_generic.c
-@@ -1038,6 +1038,8 @@ static void attach_one_default_qdisc(struct net_device *dev,
- 
- 	if (dev->priv_flags & IFF_NO_QUEUE)
- 		ops = &noqueue_qdisc_ops;
-+	else if(dev->type == ARPHRD_CAN)
-+		ops = &pfifo_fast_ops;
- 
- 	qdisc = qdisc_create_dflt(dev_queue, ops, TC_H_ROOT, NULL);
- 	if (!qdisc) {
--- 
-2.25.0
-