diff options
| author | Stas Sergeev <stsp@list.ru> | 2015-07-21 00:49:56 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-21 23:12:55 (GMT) |
| commit | 868a4215be9a6d80548ccb74763b883dc99d32a2 (patch) | |
| tree | 5cb16961e37d0ae39c485ab0b8ff871595701459 | |
| parent | d2eac98f7d1b950b762a7eca05a9ce0ea1d878d2 (diff) | |
| download | linux-868a4215be9a6d80548ccb74763b883dc99d32a2.tar.xz | |
net: phy: fixed_phy: handle link-down case
fixed_phy_register() currently hardcodes the fixed PHY link to 1, and
expects to find a "speed" parameter to provide correct information
towards the fixed PHY consumer.
In a subsequent change, where we allow "managed" (e.g: (RS)GMII in-band
status auto-negotiation) fixed PHYs, none of these parameters can be
provided since they will be auto-negotiated, hence, we just provide a
zero-initialized fixed_phy_status to fixed_phy_register() which makes it
fail when we call fixed_phy_update_regs() since status.speed = 0 which
makes us hit the "default" label and error out.
Without this change, we would also see potentially inconsistent
speed/duplex parameters for fixed PHYs when the link is DOWN.
CC: netdev@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net>
[florian: add more background to why this is correct and desirable]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/phy/fixed_phy.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c index 1960b46..479b93f 100644 --- a/drivers/net/phy/fixed_phy.c +++ b/drivers/net/phy/fixed_phy.c @@ -52,6 +52,10 @@ static int fixed_phy_update_regs(struct fixed_phy *fp) u16 lpagb = 0; u16 lpa = 0; + if (!fp->status.link) + goto done; + bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE; + if (fp->status.duplex) { bmcr |= BMCR_FULLDPLX; @@ -96,15 +100,13 @@ static int fixed_phy_update_regs(struct fixed_phy *fp) } } - if (fp->status.link) - bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE; - if (fp->status.pause) lpa |= LPA_PAUSE_CAP; if (fp->status.asym_pause) lpa |= LPA_PAUSE_ASYM; +done: fp->regs[MII_PHYSID1] = 0; fp->regs[MII_PHYSID2] = 0; |