IB/qib: Turn off IB latency mode
authorRalph Campbell <ralph.campbell@qlogic.com>
Wed, 23 Jun 2010 15:58:31 +0000 (15:58 +0000)
committerRoland Dreier <rolandd@cisco.com>
Wed, 21 Jul 2010 18:39:31 +0000 (11:39 -0700)
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>
drivers/infiniband/hw/qib/qib_iba7322.c

index 5eedf83e2c3b2553dca977d4f9560c2031cc6ddf..fc14ef8e55972015b8273862edfbaf2cb6cc4f96 100644 (file)
@@ -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));