IB/ipath: enable PE800 receive interrupts on user ports

Fixed so it works on the PE-800.  It had not previously been updated to
match PE-800 receive interrupt differences from HT-400.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index bd14eb1e6529..ada267e41f6c 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -1224,6 +1224,10 @@ static unsigned int ipath_poll(struct file *fp,
 
         if (tail == head) {
                 set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
+                if(dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */
+                        (void)ipath_write_ureg(dd, ur_rcvhdrhead,
+                                               dd->ipath_rhdrhead_intr_off
+                                               | head, pd->port_port);
                 poll_wait(fp, &pd->port_wait, pt);
 
                 if (test_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag)) {