[SCSI] be2iscsi: Adding support for various Async messages from chip

This patch allows for future addition of various async messages
from the chip. This ensures that the driver won't hit a BUG_ON if
the Firmware used is newer than inbox driver and so is using
latest async messages.

Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/be2iscsi/be_cmds.c

@@ -135,11 +135,15 @@ int beiscsi_process_mcc(struct beiscsi_hba *phba)
 	while ((compl = be_mcc_compl_get(phba))) {
 		if (compl->flags & CQE_FLAGS_ASYNC_MASK) {
 			/* Interpret flags as an async trailer */
-			BUG_ON(!is_link_state_evt(compl->flags));
+			if (is_link_state_evt(compl->flags))
+				/* Interpret compl as a async link evt */
+				beiscsi_async_link_state_process(phba,
+				   (struct be_async_event_link_state *) compl);
+			else
+				SE_DEBUG(DBG_LVL_1,
+					 " Unsupported Async Event, flags"
+					 " = 0x%08x \n", compl->flags);
 
-			/* Interpret compl as a async link evt */
-			beiscsi_async_link_state_process(phba,
-				(struct be_async_event_link_state *) compl);
 		} else if (compl->flags & CQE_FLAGS_COMPLETED_MASK) {
 				status = be_mcc_compl_process(ctrl, compl);
 				atomic_dec(&phba->ctrl.mcc_obj.q.used);