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, 110 deletions

diff --git a/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch b/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch
deleted file mode 100644
index 6cbd0864f7..0000000000
--- a/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch
+++ /dev/null
@@ -1,110 +0,0 @@
-From fb56cd08880aff8fb030e684fa4311bef712a499 Mon Sep 17 00:00:00 2001
-From: Russell King <rmk+kernel@armlinux.org.uk>
-Date: Tue, 5 Nov 2019 13:02:30 +0000
-Subject: [PATCH 633/660] net: sfp: allow sfp to probe slow to initialise GPON
- modules
-
-Some GPON modules (e.g. Huawei MA5671A) take a significant amount of
-time to start responding on the I2C bus, contary to the SFF
-specifications.
-
-Work around this by implementing a two-level timeout strategy, where
-we initially quickly retry for the module, and then use a slower retry
-after we exceed a maximum number of quick attempts.
-
-Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
----
- drivers/net/phy/sfp.c | 38 ++++++++++++++++++++++++++++----------
- 1 file changed, 28 insertions(+), 10 deletions(-)
-
---- a/drivers/net/phy/sfp.c
-+++ b/drivers/net/phy/sfp.c
-@@ -165,9 +165,12 @@ static const enum gpiod_flags gpio_flags
-  * The SFF-8472 specifies t_serial ("Time from power on until module is
-  * ready for data transmission over the two wire serial bus.") as 300ms.
-  */
--#define T_SERIAL	msecs_to_jiffies(300)
--#define T_HPOWER_LEVEL	msecs_to_jiffies(300)
--#define T_PROBE_RETRY	msecs_to_jiffies(100)
-+#define T_SERIAL		msecs_to_jiffies(300)
-+#define T_HPOWER_LEVEL		msecs_to_jiffies(300)
-+#define T_PROBE_RETRY_INIT	msecs_to_jiffies(100)
-+#define R_PROBE_RETRY_INIT	10
-+#define T_PROBE_RETRY_SLOW	msecs_to_jiffies(5000)
-+#define R_PROBE_RETRY_SLOW	12
- 
- /* SFP modules appear to always have their PHY configured for bus address
-  * 0x56 (which with mdio-i2c, translates to a PHY address of 22).
-@@ -202,6 +205,8 @@ struct sfp {
- 	struct delayed_work timeout;
- 	struct mutex sm_mutex;			/* Protects state machine */
- 	unsigned char sm_mod_state;
-+	unsigned char sm_mod_tries_init;
-+	unsigned char sm_mod_tries;
- 	unsigned char sm_dev_state;
- 	unsigned short sm_state;
- 	unsigned int sm_retries;
-@@ -1392,7 +1397,7 @@ static int sfp_sm_mod_hpower(struct sfp
- 	return 0;
- }
- 
--static int sfp_sm_mod_probe(struct sfp *sfp)
-+static int sfp_sm_mod_probe(struct sfp *sfp, bool report)
- {
- 	/* SFP module inserted - read I2C data */
- 	struct sfp_eeprom_id id;
-@@ -1402,7 +1407,8 @@ static int sfp_sm_mod_probe(struct sfp *
- 
- 	ret = sfp_read(sfp, false, 0, &id, sizeof(id));
- 	if (ret < 0) {
--		dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret);
-+		if (report)
-+			dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret);
- 		return -EAGAIN;
- 	}
- 
-@@ -1549,8 +1555,11 @@ static void sfp_sm_module(struct sfp *sf
- 
- 	switch (sfp->sm_mod_state) {
- 	default:
--		if (event == SFP_E_INSERT)
-+		if (event == SFP_E_INSERT) {
- 			sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL);
-+			sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT;
-+			sfp->sm_mod_tries = R_PROBE_RETRY_SLOW;
-+		}
- 		break;
- 
- 	case SFP_MOD_PROBE:
-@@ -1558,10 +1567,19 @@ static void sfp_sm_module(struct sfp *sf
- 		if (event != SFP_E_TIMEOUT)
- 			break;
- 
--		err = sfp_sm_mod_probe(sfp);
-+		err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1);
- 		if (err == -EAGAIN) {
--			sfp_sm_set_timer(sfp, T_PROBE_RETRY);
--			break;
-+			if (sfp->sm_mod_tries_init &&
-+			   --sfp->sm_mod_tries_init) {
-+				sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT);
-+				break;
-+			} else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) {
-+				if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1)
-+					dev_warn(sfp->dev,
-+						 "please wait, module slow to respond\n");
-+				sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW);
-+				break;
-+			}
- 		}
- 		if (err < 0) {
- 			sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
-@@ -1596,7 +1614,7 @@ static void sfp_sm_module(struct sfp *sf
- 				sfp_module_remove(sfp->sfp_bus);
- 				sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
- 			} else {
--				sfp_sm_set_timer(sfp, T_PROBE_RETRY);
-+				sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT);
- 			}
- 			break;
- 		}