target/linux/generic/backport-5.4/730-v5.5-net-sfp-allow-fault-processing-to-transition-to-othe.patch

   1 From 2aa424ee7fbe43e2cd24e28c2f6388c4e1796bd2 Mon Sep 17 00:00:00 2001
   2 From: Russell King <rmk+kernel@armlinux.org.uk>
   3 Date: Fri, 18 Oct 2019 09:58:33 +0100
   4 Subject: [PATCH 628/660] net: sfp: allow fault processing to transition to
   5  other states
   6
   7 Add the next state to sfp_sm_fault() so that it can branch to other
   8 states. This will be necessary to improve the initialisation path.
   9
  10 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  11 ---
  12  drivers/net/phy/sfp.c | 12 ++++++------
  13  1 file changed, 6 insertions(+), 6 deletions(-)
  14
  15 --- a/drivers/net/phy/sfp.c
  16 +++ b/drivers/net/phy/sfp.c
  17 @@ -1334,7 +1334,7 @@ static bool sfp_los_event_inactive(struc
  18                 event == SFP_E_LOS_LOW);
  19  }
  20
  21 -static void sfp_sm_fault(struct sfp *sfp, bool warn)
  22 +static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn)
  23  {
  24         if (sfp->sm_retries && !--sfp->sm_retries) {
  25                 dev_err(sfp->dev,
  26 @@ -1344,7 +1344,7 @@ static void sfp_sm_fault(struct sfp *sfp
  27                 if (warn)
  28                         dev_err(sfp->dev, "module transmit fault indicated\n");
  29
  30 -               sfp_sm_next(sfp, SFP_S_TX_FAULT, T_FAULT_RECOVER);
  31 +               sfp_sm_next(sfp, next_state, T_FAULT_RECOVER);
  32         }
  33  }
  34
  35 @@ -1684,14 +1684,14 @@ static void sfp_sm_main(struct sfp *sfp,
  36
  37         case SFP_S_INIT:
  38                 if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT)
  39 -                       sfp_sm_fault(sfp, true);
  40 +                       sfp_sm_fault(sfp, SFP_S_TX_FAULT, true);
  41                 else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR)
  42         init_done:      sfp_sm_link_check_los(sfp);
  43                 break;
  44
  45         case SFP_S_WAIT_LOS:
  46                 if (event == SFP_E_TX_FAULT)
  47 -                       sfp_sm_fault(sfp, true);
  48 +                       sfp_sm_fault(sfp, SFP_S_TX_FAULT, true);
  49                 else if (sfp_los_event_inactive(sfp, event))
  50                         sfp_sm_link_up(sfp);
  51                 break;
  52 @@ -1699,7 +1699,7 @@ static void sfp_sm_main(struct sfp *sfp,
  53         case SFP_S_LINK_UP:
  54                 if (event == SFP_E_TX_FAULT) {
  55                         sfp_sm_link_down(sfp);
  56 -                       sfp_sm_fault(sfp, true);
  57 +                       sfp_sm_fault(sfp, SFP_S_TX_FAULT, true);
  58                 } else if (sfp_los_event_active(sfp, event)) {
  59                         sfp_sm_link_down(sfp);
  60                         sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0);
  61 @@ -1715,7 +1715,7 @@ static void sfp_sm_main(struct sfp *sfp,
  62
  63         case SFP_S_REINIT:
  64                 if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) {
  65 -                       sfp_sm_fault(sfp, false);
  66 +                       sfp_sm_fault(sfp, SFP_S_TX_FAULT, false);
  67                 } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) {
  68                         dev_info(sfp->dev, "module transmit fault recovered\n");
  69                         sfp_sm_link_check_los(sfp);