IB/ipath: fix handling of kpiobufs

Change comment: no longer imply that user can set ipath_kpiobufs to zero.
Actually set ipath_kpiobufs from parameter. Previously only altered
per-device ipath_lastport_piobuf, which was over-written in chip init.

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c
index c63de8f..75c3721 100644
--- a/drivers/infiniband/hw/ipath/ipath_init_chip.c
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c
@@ -691,7 +691,7 @@
 	dd->ipath_pioavregs = ALIGN(val, sizeof(u64) * BITS_PER_BYTE / 2)
 		/ (sizeof(u64) * BITS_PER_BYTE / 2);
 	if (ipath_kpiobufs == 0) {
-		/* not set by user, or set explictly to default  */
+		/* not set by user (this is default) */
 		if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > 128)
 			kpiobufs = 32;
 		else
@@ -950,6 +950,7 @@
 			dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - val;
 	}
 
+	ipath_kpiobufs = val;
 	ret = 0;
 bail:
 	spin_unlock_irqrestore(&ipath_devs_lock, flags);