sfc: Test for PHYXS faults whenever we cannot test link state bits
Depending on the loopback mode, there may be no pertinent link state
bits. In this case we test the PHYXS RX fault bit instead. Make
sure to do this in all cases where there are no link state bits.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index 7f09ab5..16bc585 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -180,17 +180,12 @@
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);
- 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)
+ else if (efx->loopback_mode == LOOPBACK_PCS)
mmd_mask &= ~(MDIO_MMDREG_DEVS_PCS |
MDIO_MMDREG_DEVS_PMAPMD |
MDIO_MMDREG_DEVS_AN);
@@ -198,6 +193,13 @@
mmd_mask &= ~(MDIO_MMDREG_DEVS_PMAPMD |
MDIO_MMDREG_DEVS_AN);
+ if (!mmd_mask) {
+ /* Use presence of XGMII faults in leui of link state */
+ reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PHYXS,
+ MDIO_PHYXS_STATUS2);
+ return !(reg & (1 << MDIO_PHYXS_STATUS2_RX_FAULT_LBN));
+ }
+
while (mmd_mask) {
if (mmd_mask & 1) {
/* Double reads because link state is latched, and a