cocci: Inspect BOC state from ObjWaitState()

After returning from ObjWaitState(), replace any access of
oc->boc->state with the one that was captured by the wait
loop.

Author: dridi

tools/coccinelle/obj_wait_state_check.cocci

@@ -0,0 +1,39 @@
+/*
+ * Inspect the state returned by ObjWaitState().
+ */
+
+@capture_state@
+identifier func;
+expression oc;
+@@
+
+ func(...)
+ {
+ ...
+-ObjWaitState(oc,
++state = ObjWaitState(oc,
+ ...);
+ ...
+-oc->boc->state
++state
+ ...
+ }
+
+@declare_state@
+identifier capture_state.func;
+@@
+
+ func(...)
+ {
++enum boc_state_e state;
+ ...
+ }
+
+@ignore_state@
+statement stmt;
+@@
+
+<...stmt...>
+-ObjWaitState(
++(void)ObjWaitState(
+ ...);