diff options
| -rw-r--r-- | drivers/net/phy/sfp.c | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index cb0a35b1bb71..bb4ede83bf53 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -36,6 +36,8 @@ enum { SFP_E_INSERT = 0, SFP_E_REMOVE, + SFP_E_DEV_ATTACH, + SFP_E_DEV_DETACH, SFP_E_DEV_DOWN, SFP_E_DEV_UP, SFP_E_TX_FAULT, @@ -50,7 +52,8 @@ enum { SFP_MOD_PRESENT, SFP_MOD_ERROR, - SFP_DEV_DOWN = 0, + SFP_DEV_DETACHED = 0, + SFP_DEV_DOWN, SFP_DEV_UP, SFP_S_DOWN = 0, @@ -80,6 +83,7 @@ static const char *mod_state_to_str(unsigned short mod_state) } static const char * const dev_state_strings[] = { + [SFP_DEV_DETACHED] = "detached", [SFP_DEV_DOWN] = "down", [SFP_DEV_UP] = "up", }; @@ -94,6 +98,8 @@ static const char *dev_state_to_str(unsigned short dev_state) static const char * const event_strings[] = { [SFP_E_INSERT] = "insert", [SFP_E_REMOVE] = "remove", + [SFP_E_DEV_ATTACH] = "dev_attach", + [SFP_E_DEV_DETACH] = "dev_detach", [SFP_E_DEV_DOWN] = "dev_down", [SFP_E_DEV_UP] = "dev_up", [SFP_E_TX_FAULT] = "tx_fault", @@ -188,7 +194,6 @@ struct sfp { struct gpio_desc *gpio[GPIO_MAX]; int gpio_irq[GPIO_MAX]; - bool attached; struct mutex st_mutex; /* Protects state */ unsigned int state; struct delayed_work poll; @@ -1559,17 +1564,26 @@ static void sfp_sm_mod_remove(struct sfp *sfp) dev_info(sfp->dev, "module removed\n"); } -/* This state machine tracks the netdev up/down state */ +/* This state machine tracks the upstream's state */ static void sfp_sm_device(struct sfp *sfp, unsigned int event) { switch (sfp->sm_dev_state) { default: - if (event == SFP_E_DEV_UP) + if (event == SFP_E_DEV_ATTACH) + sfp->sm_dev_state = SFP_DEV_DOWN; + break; + + case SFP_DEV_DOWN: + if (event == SFP_E_DEV_DETACH) + sfp->sm_dev_state = SFP_DEV_DETACHED; + else if (event == SFP_E_DEV_UP) sfp->sm_dev_state = SFP_DEV_UP; break; case SFP_DEV_UP: - if (event == SFP_E_DEV_DOWN) + if (event == SFP_E_DEV_DETACH) + sfp->sm_dev_state = SFP_DEV_DETACHED; + else if (event == SFP_E_DEV_DOWN) sfp->sm_dev_state = SFP_DEV_DOWN; break; } @@ -1580,17 +1594,20 @@ static void sfp_sm_device(struct sfp *sfp, unsigned int event) */ static void sfp_sm_module(struct sfp *sfp, unsigned int event) { - /* Handle remove event globally, it resets this state machine */ - if (event == SFP_E_REMOVE) { + /* Handle remove event globally, it resets this state machine. + * Also deal with upstream detachment. + */ + if (event == SFP_E_REMOVE || sfp->sm_dev_state < SFP_DEV_DOWN) { if (sfp->sm_mod_state > SFP_MOD_PROBE) sfp_sm_mod_remove(sfp); - sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); + if (sfp->sm_mod_state != SFP_MOD_EMPTY) + sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); return; } switch (sfp->sm_mod_state) { default: - if (event == SFP_E_INSERT && sfp->attached) + if (event == SFP_E_INSERT) sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); break; @@ -1756,8 +1773,8 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) sm_state_to_str(sfp->sm_state), event_to_str(event)); - sfp_sm_module(sfp, event); sfp_sm_device(sfp, event); + sfp_sm_module(sfp, event); sfp_sm_main(sfp, event); dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", @@ -1770,15 +1787,14 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) static void sfp_attach(struct sfp *sfp) { - sfp->attached = true; + sfp_sm_event(sfp, SFP_E_DEV_ATTACH); if (sfp->state & SFP_F_PRESENT) sfp_sm_event(sfp, SFP_E_INSERT); } static void sfp_detach(struct sfp *sfp) { - sfp->attached = false; - sfp_sm_event(sfp, SFP_E_REMOVE); + sfp_sm_event(sfp, SFP_E_DEV_DETACH); } static void sfp_start(struct sfp *sfp) |