diff options
Diffstat (limited to 'drivers/net/phy/phy.c')
| -rw-r--r-- | drivers/net/phy/phy.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index c1c1af9abd..ae37dd6c1e 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -727,12 +727,23 @@ static struct phy_device *create_phy_by_mask(struct mii_dev *bus, while (phy_mask) { int addr = ffs(phy_mask) - 1; int r = get_phy_id(bus, addr, devad, &phy_id); + + /* + * If the PHY ID is flat 0 we ignore it. There are C45 PHYs + * that return all 0s for C22 reads (like Aquantia AQR112) and + * there are C22 PHYs that return all 0s for C45 reads (like + * Atheros AR8035). + */ + if (r == 0 && phy_id == 0) + goto next; + /* If the PHY ID is mostly f's, we didn't find anything */ if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) { is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true; return phy_device_create(bus, addr, phy_id, is_c45, interface); } +next: phy_mask &= ~(1 << addr); } return NULL; |