From c16517d26de30c90dabce1e456615fd7fbdce07c Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 23 Feb 2020 13:20:11 +0100 Subject: kernel: copy kernel 4.19 code to 5.4 No changes were done to the patches while coping them. Currently they do not apply on top of kernel 5.4. Signed-off-by: Hauke Mehrtens --- ...ure-TX_FAULT-has-deasserted-before-probin.patch | 80 ++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 target/linux/generic/backport-5.4/731-v5.5-net-sfp-ensure-TX_FAULT-has-deasserted-before-probin.patch (limited to 'target/linux/generic/backport-5.4/731-v5.5-net-sfp-ensure-TX_FAULT-has-deasserted-before-probin.patch') diff --git a/target/linux/generic/backport-5.4/731-v5.5-net-sfp-ensure-TX_FAULT-has-deasserted-before-probin.patch b/target/linux/generic/backport-5.4/731-v5.5-net-sfp-ensure-TX_FAULT-has-deasserted-before-probin.patch new file mode 100644 index 0000000000..03415fb6e7 --- /dev/null +++ b/target/linux/generic/backport-5.4/731-v5.5-net-sfp-ensure-TX_FAULT-has-deasserted-before-probin.patch @@ -0,0 +1,80 @@ +From 38b62a12231be4b86fc5ca5477579d29831c02a5 Mon Sep 17 00:00:00 2001 +From: Russell King +Date: Fri, 18 Oct 2019 10:31:07 +0100 +Subject: [PATCH 629/660] net: sfp: ensure TX_FAULT has deasserted before + probing the PHY + +TX_FAULT should be deasserted to indicate that the module has completed +its initialisation. This may include the on-board PHY, so wait until +the module has deasserted TX_FAULT before probing the PHY. + +This means that we need an extra state to handle a TX_FAULT that +remains set for longer than t_init, since using the existing handling +state would bypass the PHY probe. + +Signed-off-by: Russell King +--- + drivers/net/phy/sfp.c | 31 +++++++++++++++++++++++++------ + 1 file changed, 25 insertions(+), 6 deletions(-) + +--- a/drivers/net/phy/sfp.c ++++ b/drivers/net/phy/sfp.c +@@ -54,6 +54,7 @@ enum { + SFP_S_DOWN = 0, + SFP_S_WAIT, + SFP_S_INIT, ++ SFP_S_INIT_TX_FAULT, + SFP_S_WAIT_LOS, + SFP_S_LINK_UP, + SFP_S_TX_FAULT, +@@ -111,6 +112,7 @@ static const char * const sm_state_strin + [SFP_S_DOWN] = "down", + [SFP_S_WAIT] = "wait", + [SFP_S_INIT] = "init", ++ [SFP_S_INIT_TX_FAULT] = "init_tx_fault", + [SFP_S_WAIT_LOS] = "wait_los", + [SFP_S_LINK_UP] = "link_up", + [SFP_S_TX_FAULT] = "tx_fault", +@@ -1595,8 +1597,6 @@ static void sfp_sm_main(struct sfp *sfp, + 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 +@@ -1618,10 +1618,29 @@ static void sfp_sm_main(struct sfp *sfp, + break; + + case SFP_S_INIT: +- if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) +- sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); +- else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) +- init_done: sfp_sm_link_check_los(sfp); ++ if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { ++ /* TX_FAULT is still asserted after t_init, so assume ++ * there is a fault. ++ */ ++ sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, ++ sfp->sm_retries == 5); ++ } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { ++ init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT ++ * clear. Probe for the PHY and check the LOS state. ++ */ ++ sfp_sm_probe_for_phy(sfp); ++ sfp_sm_link_check_los(sfp); ++ ++ /* Reset the fault retry count */ ++ sfp->sm_retries = 5; ++ } ++ break; ++ ++ case SFP_S_INIT_TX_FAULT: ++ if (event == SFP_E_TIMEOUT) { ++ sfp_module_tx_fault_reset(sfp); ++ sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); ++ } + break; + + case SFP_S_WAIT_LOS: -- cgit v1.2.3