IB/ipath: control receive polarity inversion

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_iba6110.c b/drivers/infiniband/hw/ipath/ipath_iba6110.c
index 7028c98e5c4f..bf2455a6d562 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6110.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6110.c
@@ -1290,6 +1290,15 @@ static int ipath_ht_bringup_serdes(struct ipath_devdata *dd)
                 val &= ~INFINIPATH_XGXS_RESET;
                 change = 1;
         }
+        if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
+             INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
+                /* need to compensate for Tx inversion in partner */
+                val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
+                         INFINIPATH_XGXS_RX_POL_SHIFT);
+                val |= dd->ipath_rx_pol_inv <<
+                        INFINIPATH_XGXS_RX_POL_SHIFT;
+                change = 1;
+        }
         if (change)
                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);