diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2008-12-26 13:46:12 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-26 13:46:12 -0800 |
| commit | caa8d8bbddc9157cb8f34465be98fc83faf37155 (patch) | |
| tree | 614d9c3396b94f154239a8199758b4068c72a3e5 /drivers/net/sfc/mdio_10g.c | |
| parent | 6977dc6309ea8bbcb24c0a1356c33969e4a07410 (diff) | |
| download | blackbird-op-linux-caa8d8bbddc9157cb8f34465be98fc83faf37155.tar.gz blackbird-op-linux-caa8d8bbddc9157cb8f34465be98fc83faf37155.zip | |
sfc: Fix unreliable link detection in some loopback modes
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sfc/mdio_10g.c')
| -rw-r--r-- | drivers/net/sfc/mdio_10g.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c index 037601e0b9d7..f131ad2b6832 100644 --- a/drivers/net/sfc/mdio_10g.c +++ b/drivers/net/sfc/mdio_10g.c @@ -167,7 +167,7 @@ int mdio_clause45_check_mmds(struct efx_nic *efx, bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask) { int phy_id = efx->mii.phy_id; - int status; + u32 reg; bool ok = true; int mmd = 0; @@ -179,12 +179,17 @@ bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask) return false; else if (efx_phy_mode_disabled(efx->phy_mode)) return false; - else if (efx->loopback_mode == LOOPBACK_PHYXS) + else if (efx->loopback_mode == LOOPBACK_PHYXS) { mmd_mask &= ~(MDIO_MMDREG_DEVS_PHYXS | MDIO_MMDREG_DEVS_PCS | MDIO_MMDREG_DEVS_PMAPMD | MDIO_MMDREG_DEVS_AN); - else if (efx->loopback_mode == LOOPBACK_PCS) + if (!mmd_mask) { + reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PHYXS, + MDIO_PHYXS_STATUS2); + return !(reg & (1 << MDIO_PHYXS_STATUS2_RX_FAULT_LBN)); + } + } else if (efx->loopback_mode == LOOPBACK_PCS) mmd_mask &= ~(MDIO_MMDREG_DEVS_PCS | MDIO_MMDREG_DEVS_PMAPMD | MDIO_MMDREG_DEVS_AN); @@ -196,12 +201,11 @@ bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask) if (mmd_mask & 1) { /* Double reads because link state is latched, and a * read moves the current state into the register */ - status = mdio_clause45_read(efx, phy_id, - mmd, MDIO_MMDREG_STAT1); - status = mdio_clause45_read(efx, phy_id, - mmd, MDIO_MMDREG_STAT1); - - ok = ok && (status & (1 << MDIO_MMDREG_STAT1_LINK_LBN)); + reg = mdio_clause45_read(efx, phy_id, + mmd, MDIO_MMDREG_STAT1); + reg = mdio_clause45_read(efx, phy_id, + mmd, MDIO_MMDREG_STAT1); + ok = ok && (reg & (1 << MDIO_MMDREG_STAT1_LINK_LBN)); } mmd_mask = (mmd_mask >> 1); mmd++; |
