IB/qib: Turn off IB latency mode

Turn off IB latency mode. This improves link quality for slower
process chips.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 5eedf83e2c3b..fc14ef8e5597 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -7271,6 +7271,8 @@ static int serdes_7322_init(struct qib_pportdata *ppd)
         ibsd_wr_allchans(ppd, 20, (4 << 13), BMASK(15, 13)); /* SDR */
 
         data = qib_read_kreg_port(ppd, krp_serdesctrl);
+        /* Turn off IB latency mode */
+        data &= ~SYM_MASK(IBSerdesCtrl_0, IB_LAT_MODE);
         qib_write_kreg_port(ppd, krp_serdesctrl, data |
                 SYM_MASK(IBSerdesCtrl_0, RXLOSEN));