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authorHynek Petrak <hynek@swac.cz>2006-12-19 22:08:49 +0100
committerJeff Garzik <jeff@garzik.org>2006-12-26 22:41:08 +0100
commit3e65bb94a9de542c464bf00035a08b0e0a76993d (patch)
treed9ebc1b8ba3946519fdb0083608e6e68ce0d019e /drivers/net/ibm_emac
parentep93xx: some minor cleanups to the ep93xx eth driver (diff)
downloadlinux-3e65bb94a9de542c464bf00035a08b0e0a76993d.tar.xz
linux-3e65bb94a9de542c464bf00035a08b0e0a76993d.zip
PHY probe not working properly for ibm_emac (PPC4xx)
I have a system with AMCC PowerPC 405EP and PHY Intel LXT971A. Linux 2.6.18.3 is not able to detect the PHY ID correctly. The PHY ID detected is 0, but should be 0x1d. This is because phy_read() (__emac_mdio_read() resp.) from drivers/net/ibm_emac/ibm_emac_core.c might return -ETIMEDOUT or -EREMOTEIO on error. This is ignored inside the int mii_phy_probe(struct mii_phy *phy, int address) from drivers/net/ibm_emac/ibm_emac_phy.c as the return value is assigned to an u32 variable. Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/ibm_emac')
-rw-r--r--drivers/net/ibm_emac/ibm_emac_phy.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ibm_emac/ibm_emac_phy.c b/drivers/net/ibm_emac/ibm_emac_phy.c
index 4a97024061e5..9074f76ee2bf 100644
--- a/drivers/net/ibm_emac/ibm_emac_phy.c
+++ b/drivers/net/ibm_emac/ibm_emac_phy.c
@@ -309,7 +309,7 @@ int mii_phy_probe(struct mii_phy *phy, int address)
{
struct mii_phy_def *def;
int i;
- u32 id;
+ int id;
phy->autoneg = AUTONEG_DISABLE;
phy->advertising = 0;
@@ -324,6 +324,8 @@ int mii_phy_probe(struct mii_phy *phy, int address)
/* Read ID and find matching entry */
id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2);
+ if (id < 0)
+ return -ENODEV;
for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
if ((id & def->phy_id_mask) == def->phy_id)
break;