IB/ipath: Fix IB_EVENT_PORT_ERR event

The link state event calls were being generated when the SM told the SMA
to change link states. This works for IB_EVENT_PORT_ACTIVE but not if
the link goes down and stays down. The fix is to generate event calls
from the interrupt handler when the HW link state changes.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index 872fb36..8786dd7 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -42,6 +42,7 @@
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <asm/io.h>
+#include <rdma/ib_verbs.h>
 
 #include "ipath_common.h"
 #include "ipath_debug.h"
@@ -775,6 +776,7 @@
 int ipath_update_eeprom_log(struct ipath_devdata *dd);
 void ipath_inc_eeprom_err(struct ipath_devdata *dd, u32 eidx, u32 incr);
 u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);
+void signal_ib_event(struct ipath_devdata *dd, enum ib_event_type ev);
 
 /*
  * Set LED override, only the two LSBs have "public" meaning, but