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, 198 deletions

diff --git a/target/linux/generic/backport-4.19/736-v5.5-net-sfp-allow-modules-with-slow-diagnostics-to-probe.patch b/target/linux/generic/backport-4.19/736-v5.5-net-sfp-allow-modules-with-slow-diagnostics-to-probe.patch
deleted file mode 100644
index fe1e6c4822..0000000000
--- a/target/linux/generic/backport-4.19/736-v5.5-net-sfp-allow-modules-with-slow-diagnostics-to-probe.patch
+++ /dev/null
@@ -1,198 +0,0 @@
-From 559391fc20fae506adcb311b904cc544c76436c0 Mon Sep 17 00:00:00 2001
-From: Russell King <rmk+kernel@armlinux.org.uk>
-Date: Thu, 7 Nov 2019 18:52:07 +0000
-Subject: [PATCH 634/660] net: sfp: allow modules with slow diagnostics to
- probe
-
-When a module is inserted, we attempt to read read the ID from address
-0x50.  Once we are able to read the ID, we immediately attempt to
-initialise the hwmon support by reading from address 0x51.  If this
-fails, then we fall into error state, and assume that the module is
-not usable.
-
-Modules such as the ALCATELLUCENT 3FE46541AA use a real EEPROM for
-I2C address 0x50, which responds immediately.  However, address 0x51
-is an emulated, which only becomes available once the on-board firmware
-has booted.  This prompts us to fall into the error state.
-
-Since the module may be usable without diagnostics, arrange for the
-hwmon probe independent of the rest of the SFP itself, retrying every
-5s for up to about 60s for the monitoring to become available, and
-print an error message if it doesn't become available.
-
-Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
----
- drivers/net/phy/sfp.c | 96 +++++++++++++++++++++++++++++++++----------
- 1 file changed, 74 insertions(+), 22 deletions(-)
-
---- a/drivers/net/phy/sfp.c
-+++ b/drivers/net/phy/sfp.c
-@@ -216,6 +216,8 @@ struct sfp {
- 
- #if IS_ENABLED(CONFIG_HWMON)
- 	struct sfp_diag diag;
-+	struct delayed_work hwmon_probe;
-+	unsigned int hwmon_tries;
- 	struct device *hwmon_dev;
- 	char *hwmon_name;
- #endif
-@@ -1094,29 +1096,27 @@ static const struct hwmon_chip_info sfp_
- 	.info = sfp_hwmon_info,
- };
- 
--static int sfp_hwmon_insert(struct sfp *sfp)
-+static void sfp_hwmon_probe(struct work_struct *work)
- {
-+	struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work);
- 	int err, i;
- 
--	if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE)
--		return 0;
--
--	if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM))
--		return 0;
--
--	if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)
--		/* This driver in general does not support address
--		 * change.
--		 */
--		return 0;
--
- 	err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag));
--	if (err < 0)
--		return err;
-+	if (err < 0) {
-+		if (sfp->hwmon_tries--) {
-+			mod_delayed_work(system_wq, &sfp->hwmon_probe,
-+					 T_PROBE_RETRY_SLOW);
-+		} else {
-+			dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
-+		}
-+		return;
-+	}
- 
- 	sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL);
--	if (!sfp->hwmon_name)
--		return -ENODEV;
-+	if (!sfp->hwmon_name) {
-+		dev_err(sfp->dev, "out of memory for hwmon name\n");
-+		return;
-+	}
- 
- 	for (i = 0; sfp->hwmon_name[i]; i++)
- 		if (hwmon_is_bad_char(sfp->hwmon_name[i]))
-@@ -1126,18 +1126,52 @@ static int sfp_hwmon_insert(struct sfp *
- 							 sfp->hwmon_name, sfp,
- 							 &sfp_hwmon_chip_info,
- 							 NULL);
-+	if (IS_ERR(sfp->hwmon_dev))
-+		dev_err(sfp->dev, "failed to register hwmon device: %ld\n",
-+			PTR_ERR(sfp->hwmon_dev));
-+}
-+
-+static int sfp_hwmon_insert(struct sfp *sfp)
-+{
-+	if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE)
-+		return 0;
-+
-+	if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM))
-+		return 0;
-+
-+	if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)
-+		/* This driver in general does not support address
-+		 * change.
-+		 */
-+		return 0;
-+
-+	mod_delayed_work(system_wq, &sfp->hwmon_probe, 1);
-+	sfp->hwmon_tries = R_PROBE_RETRY_SLOW;
- 
--	return PTR_ERR_OR_ZERO(sfp->hwmon_dev);
-+	return 0;
- }
- 
- static void sfp_hwmon_remove(struct sfp *sfp)
- {
-+	cancel_delayed_work_sync(&sfp->hwmon_probe);
- 	if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) {
- 		hwmon_device_unregister(sfp->hwmon_dev);
- 		sfp->hwmon_dev = NULL;
- 		kfree(sfp->hwmon_name);
- 	}
- }
-+
-+static int sfp_hwmon_init(struct sfp *sfp)
-+{
-+	INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe);
-+
-+	return 0;
-+}
-+
-+static void sfp_hwmon_exit(struct sfp *sfp)
-+{
-+	cancel_delayed_work_sync(&sfp->hwmon_probe);
-+}
- #else
- static int sfp_hwmon_insert(struct sfp *sfp)
- {
-@@ -1147,6 +1181,15 @@ static int sfp_hwmon_insert(struct sfp *
- static void sfp_hwmon_remove(struct sfp *sfp)
- {
- }
-+
-+static int sfp_hwmon_init(struct sfp *sfp)
-+{
-+	return 0;
-+}
-+
-+static void sfp_hwmon_exit(struct sfp *sfp)
-+{
-+}
- #endif
- 
- /* Helpers */
-@@ -1483,10 +1526,6 @@ static int sfp_sm_mod_probe(struct sfp *
- 	if (ret < 0)
- 		return ret;
- 
--	ret = sfp_hwmon_insert(sfp);
--	if (ret < 0)
--		return ret;
--
- 	return 0;
- }
- 
-@@ -1635,6 +1674,15 @@ static void sfp_sm_module(struct sfp *sf
- 	case SFP_MOD_ERROR:
- 		break;
- 	}
-+
-+#if IS_ENABLED(CONFIG_HWMON)
-+	if (sfp->sm_mod_state >= SFP_MOD_WAITDEV &&
-+	    IS_ERR_OR_NULL(sfp->hwmon_dev)) {
-+		err = sfp_hwmon_insert(sfp);
-+		if (err)
-+			dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
-+	}
-+#endif
- }
- 
- static void sfp_sm_main(struct sfp *sfp, unsigned int event)
-@@ -1936,6 +1984,8 @@ static struct sfp *sfp_alloc(struct devi
- 	INIT_DELAYED_WORK(&sfp->poll, sfp_poll);
- 	INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout);
- 
-+	sfp_hwmon_init(sfp);
-+
- 	return sfp;
- }
- 
-@@ -1943,6 +1993,8 @@ static void sfp_cleanup(void *data)
- {
- 	struct sfp *sfp = data;
- 
-+	sfp_hwmon_exit(sfp);
-+
- 	cancel_delayed_work_sync(&sfp->poll);
- 	cancel_delayed_work_sync(&sfp->timeout);
- 	if (sfp->i2c_mii) {