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authorBen Hutchings <bhutchings@solarflare.com>2009-08-26 12:16:58 +0400
committerDavid S. Miller <davem@davemloft.net>2009-08-27 04:38:53 +0400
commit771046d7b1def64c00a5a47ca48526cbbacd7fe3 (patch)
tree84c534da35aaf759c9186157b54386daa36f21ba /drivers/net/mdio.c
parentd4ec09acdb15cdb5afdb5cd03f6bceb5c3c690a5 (diff)
downloadlinux-771046d7b1def64c00a5a47ca48526cbbacd7fe3.tar.xz
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 <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/mdio.c')
-rw-r--r--drivers/net/mdio.c13
1 files changed, 10 insertions, 3 deletions
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;
}
}