ib_srpt: Handle GID change events properly

The mlx4_core driver generates a GID change event after a port has been
changed from IB into Ethernet mode. Avoid that this causes the following
error message to appear in the system log:
    
ib_srpt: ***ERROR***: received unrecognized IB event 18


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5346 d57e44dd-8a1f-0410-8b47-8ef2f437770f

srpt/src/ib_srpt.c

@@ -341,6 +341,7 @@ static void srpt_event_handler(struct ib_event_handler *handler,
 	case IB_EVENT_PKEY_CHANGE:
 	case IB_EVENT_SM_CHANGE:
 	case IB_EVENT_CLIENT_REREGISTER:
+	case IB_EVENT_GID_CHANGE:
 		/* Refresh port data asynchronously. */
 		port_num = event->element.port_num - 1;
 		if (port_num < sdev->device->phys_port_cnt) {

srpt/src/ib_srpt.h

@@ -132,6 +132,13 @@ enum {
 	RDMA_COMPL_TIMEOUT_S = 80,
 };
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0) &&	\
+	!(defined(CONFIG_SUSE_KERNEL) &&		\
+	LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 76))
+/* See also patch "IB/core: Add GID change event" (commit 761d90ed4). */
+enum { IB_EVENT_GID_CHANGE = 18 };
+#endif
+
 enum srpt_opcode {
 	SRPT_RECV,
 	SRPT_SEND,