accessing a lan9303 switch with the cpsw driver results in wrong speed detection, as the switch sets the BMSR_ERCAP in BMSR register, and follow read of the MII_STAT1000 register fails, as the switch does not support it. Current code did not check, if a phy_read() fails ... fix this.

Signed-off-by: Heiko Schocher hs@denx.de Cc: Joe Hershberger joe.hershberger@gmail.com --- drivers/net/cpsw.c | 2 +- drivers/net/phy/phy.c | 6 +++++- 2 Dateien geändert, 6 Zeilen hinzugefügt(+), 2 Zeilen entfernt(-)

diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c index 379b679..52c08ed 100644 --- a/drivers/net/cpsw.c +++ b/drivers/net/cpsw.c @@ -489,7 +489,7 @@ static inline void wait_for_idle(void) static int cpsw_mdio_read(struct mii_dev *bus, int phy_id, int dev_addr, int phy_reg) { - unsigned short data; + int data; u32 reg;

if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK) diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index effe3e3..2fdccb8 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -291,7 +291,7 @@ int genphy_parse_link(struct phy_device *phydev) /* We're using autonegotiation */ if (mii_reg & BMSR_ANEGCAPABLE) { u32 lpa = 0; - u32 gblpa = 0; + int gblpa = 0; u32 estatus = 0;

/* Check for gigabit capability */ @@ -300,6 +300,10 @@ int genphy_parse_link(struct phy_device *phydev) * both PHYs in the link */ gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000); + if (gblpa < 0) { + debug("Could not read MII_STAT1000. Ignoring gigabit capability\n"); + gblpa = 0; + } gblpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000) << 2; }