diff options
author | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2020-10-09 21:53:35 +0200 |
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committer | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2020-10-30 19:29:59 +0100 |
commit | 278512665094888d3c007fdd74e090496d6c811d (patch) | |
tree | 6d4f2cdddef316e07829b89c1c1a790d0db92fc3 /target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch | |
parent | 3824fa26d256d162fc0e02e46714eda7816cae4a (diff) | |
download | upstream-278512665094888d3c007fdd74e090496d6c811d.tar.gz upstream-278512665094888d3c007fdd74e090496d6c811d.tar.bz2 upstream-278512665094888d3c007fdd74e090496d6c811d.zip |
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>
Diffstat (limited to 'target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch')
-rw-r--r-- | target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch b/target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch deleted file mode 100644 index 5dc92bd10e..0000000000 --- a/target/linux/generic/backport-4.19/729-v5.5-net-sfp-eliminate-mdelay-from-PHY-probe.patch +++ /dev/null @@ -1,130 +0,0 @@ -From 0fe72afaa31f98ebd71bd6683fc47021105d0157 Mon Sep 17 00:00:00 2001 -From: Russell King <rmk+kernel@armlinux.org.uk> -Date: Fri, 18 Oct 2019 10:21:46 +0100 -Subject: [PATCH 627/660] net: sfp: eliminate mdelay() from PHY probe - -Rather than using mdelay() to wait before probing the PHY (which holds -several locks, including the rtnl lock), add an extra wait state to -the state machine to introduce the 50ms delay without holding any -locks. - -Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> ---- - drivers/net/phy/sfp.c | 52 +++++++++++++++++++++++++++++++++---------- - 1 file changed, 40 insertions(+), 12 deletions(-) - ---- a/drivers/net/phy/sfp.c -+++ b/drivers/net/phy/sfp.c -@@ -52,6 +52,7 @@ enum { - SFP_DEV_UP, - - SFP_S_DOWN = 0, -+ SFP_S_WAIT, - SFP_S_INIT, - SFP_S_WAIT_LOS, - SFP_S_LINK_UP, -@@ -108,6 +109,7 @@ static const char *event_to_str(unsigned - - static const char * const sm_state_strings[] = { - [SFP_S_DOWN] = "down", -+ [SFP_S_WAIT] = "wait", - [SFP_S_INIT] = "init", - [SFP_S_WAIT_LOS] = "wait_los", - [SFP_S_LINK_UP] = "link_up", -@@ -139,6 +141,7 @@ static const enum gpiod_flags gpio_flags - GPIOD_ASIS, - }; - -+#define T_WAIT msecs_to_jiffies(50) - #define T_INIT_JIFFIES msecs_to_jiffies(300) - #define T_RESET_US 10 - #define T_FAULT_RECOVER msecs_to_jiffies(1000) -@@ -159,9 +162,6 @@ static const enum gpiod_flags gpio_flags - */ - #define SFP_PHY_ADDR 22 - --/* Give this long for the PHY to reset. */ --#define T_PHY_RESET_MS 50 -- - struct sff_data { - unsigned int gpios; - bool (*module_supported)(const struct sfp_eeprom_id *id); -@@ -1202,8 +1202,6 @@ static void sfp_sm_probe_phy(struct sfp - struct phy_device *phy; - int err; - -- msleep(T_PHY_RESET_MS); -- - phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); - if (phy == ERR_PTR(-ENODEV)) { - dev_info(sfp->dev, "no PHY detected\n"); -@@ -1558,6 +1556,8 @@ static void sfp_sm_module(struct sfp *sf - - static void sfp_sm_main(struct sfp *sfp, unsigned int event) - { -+ unsigned long timeout; -+ - /* Some events are global */ - if (sfp->sm_state != SFP_S_DOWN && - (sfp->sm_mod_state != SFP_MOD_PRESENT || -@@ -1575,17 +1575,45 @@ static void sfp_sm_main(struct sfp *sfp, - /* The main state machine */ - switch (sfp->sm_state) { - case SFP_S_DOWN: -- if (sfp->sm_mod_state == SFP_MOD_PRESENT && -- sfp->sm_dev_state == SFP_DEV_UP) { -- sfp_sm_mod_init(sfp); -- sfp_sm_probe_for_phy(sfp); -+ if (sfp->sm_mod_state != SFP_MOD_PRESENT || -+ sfp->sm_dev_state != SFP_DEV_UP) -+ break; -+ -+ sfp_sm_mod_init(sfp); -+ -+ /* Initialise the fault clearance retries */ -+ sfp->sm_retries = 5; -+ -+ /* We need to check the TX_FAULT state, which is not defined -+ * while TX_DISABLE is asserted. The earliest we want to do -+ * anything (such as probe for a PHY) is 50ms. -+ */ -+ sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); -+ break; -+ -+ case SFP_S_WAIT: -+ if (event != SFP_E_TIMEOUT) -+ break; -+ -+ sfp_sm_probe_for_phy(sfp); - -+ if (sfp->state & SFP_F_TX_FAULT) { - /* Wait t_init before indicating that the link is up, - * provided the current state indicates no TX_FAULT. If - * TX_FAULT clears before this time, that's fine too. - */ -- sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); -- sfp->sm_retries = 5; -+ timeout = T_INIT_JIFFIES; -+ if (timeout > T_WAIT) -+ timeout -= T_WAIT; -+ else -+ timeout = 1; -+ -+ sfp_sm_next(sfp, SFP_S_INIT, timeout); -+ } else { -+ /* TX_FAULT is not asserted, assume the module has -+ * finished initialising. -+ */ -+ goto init_done; - } - break; - -@@ -1593,7 +1621,7 @@ static void sfp_sm_main(struct sfp *sfp, - if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) - sfp_sm_fault(sfp, true); - else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) -- sfp_sm_link_check_los(sfp); -+ init_done: sfp_sm_link_check_los(sfp); - break; - - case SFP_S_WAIT_LOS: |