From: Ben Hutchings Date: Wed, 26 Aug 2009 08:16:58 +0000 (+0000) Subject: mdio: Check MDIO_STAT1_FAULT in mdio45_links_ok() X-Git-Tag: MMI-PSA29.97-13-9~26976^2~284 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=771046d7b1def64c00a5a47ca48526cbbacd7fe3;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git mdio: Check MDIO_STAT1_FAULT in mdio45_links_ok() Some PHYs will report that the link is up even though there is a fault condition. Therefore, check the fault flag too. We must also read STAT2 to reset this flag. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller --- diff --git a/drivers/net/mdio.c b/drivers/net/mdio.c index 6851bdb2ce29..7d2e610f14ff 100644 --- a/drivers/net/mdio.c +++ b/drivers/net/mdio.c @@ -109,13 +109,20 @@ int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask) if (mmd_mask & (1 << devad)) { mmd_mask &= ~(1 << devad); - /* Read twice because link state is latched and a - * read moves the current state into the register */ + /* Reset the latched status and fault flags */ mdio->mdio_read(mdio->dev, mdio->prtad, devad, MDIO_STAT1); + if (devad == MDIO_MMD_PMAPMD || devad == MDIO_MMD_PCS || + devad == MDIO_MMD_PHYXS || devad == MDIO_MMD_DTEXS) + mdio->mdio_read(mdio->dev, mdio->prtad, + devad, MDIO_STAT2); + + /* Check the current status and fault flags */ reg = mdio->mdio_read(mdio->dev, mdio->prtad, devad, MDIO_STAT1); - if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) + if (reg < 0 || + (reg & (MDIO_STAT1_FAULT | MDIO_STAT1_LSTATUS)) != + MDIO_STAT1_LSTATUS) return false; } }