[XEN PATCH v2 7/9] xen/xsm: address violation of MISRA C Rule 16.2

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

Refactor the switch so that a violation of
MISRA C Rule 16.2 is resolved (A switch label shall only be used
when the most closely-enclosing compound statement is the body of
a switch statement).
Note that the switch clause ending with the pseudo
keyword "fallthrough" is an allowed exception to Rule 16.3.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
The second switch is not the best in terms of readability, so it may
be best to deviate this particular instance.
---
 xen/include/xsm/dummy.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index 88039fdd227c..84d3a8ed1c94 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -83,17 +83,17 @@ static always_inline int xsm_default_action(
         return 0;
     case XSM_TARGET:
         if ( evaluate_nospec(src == target) )
-        {
             return 0;
+        fallthrough;
     case XSM_XS_PRIV:
-            if ( evaluate_nospec(is_xenstore_domain(src)) )
-                return 0;
-        }
-        /* fall through */
+        if ( (action == XSM_XS_PRIV) &&
+             evaluate_nospec(is_xenstore_domain(src)) )
+            return 0;
+        fallthrough;
     case XSM_DM_PRIV:
         if ( target && evaluate_nospec(src->target == target) )
             return 0;
-        /* fall through */
+        fallthrough;
     case XSM_PRIV:
         if ( is_control_domain(src) )
             return 0;
-- 
2.34.1