diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-12-12 12:43:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-12 12:43:05 +0100 |
| commit | 81444a799550214f549caf579cf65a0ca55e70b7 (patch) | |
| tree | 3288dac0740be2e1e7d1af4ee51d792a6e91edf3 /drivers/net/phy/phy_device.c | |
| parent | a64d31baed104be25305e9c71585d3ea4ee9a418 (diff) | |
| parent | da485e0cb16726797e99a595a399b9fc721b91bc (diff) | |
Merge branch 'tracing/fastboot' into cpus4096
Diffstat (limited to 'drivers/net/phy/phy_device.c')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 55bc24b234e3..25acbbde4a60 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -227,8 +227,17 @@ struct phy_device * get_phy_device(struct mii_bus *bus, int addr) if (r) return ERR_PTR(r); - /* If the phy_id is all Fs or all 0s, there is no device there */ - if ((0xffff == phy_id) || (0x00 == phy_id)) + /* If the phy_id is mostly Fs, there is no device there */ + if ((phy_id & 0x1fffffff) == 0x1fffffff) + return NULL; + + /* + * Broken hardware is sometimes missing the pull down resistor on the + * MDIO line, which results in reads to non-existent devices returning + * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent + * device as well. + */ + if (phy_id == 0) return NULL; dev = phy_device_create(bus, addr, phy_id); |