diff options
author | Florian Fainelli <f.fainelli@gmail.com> | 2015-05-16 17:17:56 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-05-16 20:47:13 (GMT) |
commit | 3e2186e021125cc84560ed3633df1dc6341e9f6f (patch) | |
tree | b090e53dbd09563afe9a30aef37f338757418ba8 /drivers | |
parent | 4133fc0952cbe724161b729fb4cc63a29b5bbbfe (diff) | |
download | linux-3e2186e021125cc84560ed3633df1dc6341e9f6f.tar.xz |
net: phy: Add state machine state transitions debug prints
It can be useful to debug the PHY state machine, add dynamic debug
prints of the old and new PHY devices state under a friendly format.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/phy/phy.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 52cd8db..1457ecf 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -58,6 +58,31 @@ static const char *phy_speed_to_str(int speed) } } +#define PHY_STATE_STR(_state) \ + case PHY_##_state: \ + return __stringify(_state); \ + +static const char *phy_state_to_str(enum phy_state st) +{ + switch (st) { + PHY_STATE_STR(DOWN) + PHY_STATE_STR(STARTING) + PHY_STATE_STR(READY) + PHY_STATE_STR(PENDING) + PHY_STATE_STR(UP) + PHY_STATE_STR(AN) + PHY_STATE_STR(RUNNING) + PHY_STATE_STR(NOLINK) + PHY_STATE_STR(FORCING) + PHY_STATE_STR(CHANGELINK) + PHY_STATE_STR(HALTED) + PHY_STATE_STR(RESUMING) + } + + return NULL; +} + + /** * phy_print_status - Convenience function to print out the current phy status * @phydev: the phy_device struct @@ -770,10 +795,13 @@ void phy_state_machine(struct work_struct *work) struct phy_device *phydev = container_of(dwork, struct phy_device, state_queue); bool needs_aneg = false, do_suspend = false, do_resume = false; + enum phy_state old_state; int err = 0; mutex_lock(&phydev->lock); + old_state = phydev->state; + if (phydev->drv->link_change_notify) phydev->drv->link_change_notify(phydev); @@ -949,6 +977,9 @@ void phy_state_machine(struct work_struct *work) if (err < 0) phy_error(phydev); + dev_dbg(&phydev->dev, "PHY state change %s -> %s\n", + phy_state_to_str(old_state), phy_state_to_str(phydev->state)); + queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, PHY_STATE_TIME * HZ); } |