gfs2: re-factor function do_promote

This patch simply re-factors function do_promote to reduce the indents.
The logic should be unchanged. This makes future patches more readable.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/glock.c

@@ -494,7 +494,17 @@ __acquires(&gl->gl_lockref.lock)
 	list_for_each_entry_safe(gh, tmp, &gl->gl_holders, gh_list) {
 		if (!test_bit(HIF_WAIT, &gh->gh_iflags))
 			continue;
-		if (may_grant(gl, first_gh, gh)) {
+		if (!may_grant(gl, first_gh, gh)) {
+			/*
+			 * If we get here, it means we may not grant this holder for
+			 * some reason. If this holder is the head of the list, it
+			 * means we have a blocked holder at the head, so return 1.
+			 */
+			if (gh->gh_list.prev == &gl->gl_holders)
+				return 1;
+			do_error(gl, 0);
+			break;
+		}
 		if (!incompat_holders_demoted) {
 			demote_incompat_holders(gl, first_gh);
 			incompat_holders_demoted = true;
@@ -525,17 +535,6 @@ __acquires(&gl->gl_lockref.lock)
 		set_bit(HIF_HOLDER, &gh->gh_iflags);
 		trace_gfs2_promote(gh);
 		gfs2_holder_wake(gh);
-			continue;
-		}
-		/*
-		 * If we get here, it means we may not grant this holder for
-		 * some reason. If this holder is the head of the list, it
-		 * means we have a blocked holder at the head, so return 1.
-		 */
-		if (gh->gh_list.prev == &gl->gl_holders)
-			return 1;
-		do_error(gl, 0);
-		break;
 	}
 	return 0;
 }