[PATCH 3/10] dm: Correct target_type reference counting

[Joe Thornber]

ti->use was only getting incremented the first time a target type was
retrieved (bug introduced by recent hch patch).
--- diff/drivers/md/dm-target.c	2003-01-02 10:43:06.000000000 +0000
+++ source/drivers/md/dm-target.c	2003-01-02 11:16:16.000000000 +0000
@@ -43,15 +43,16 @@
 	struct tt_internal *ti;
 
 	read_lock(&_lock);
+
 	ti = __find_target_type(name);
-	if (ti && ti->use == 0) {
-		if (try_module_get(ti->tt.module))
-			ti->use++;
-		else
+	if (ti) {
+		if ((ti->use == 0) && !try_module_get(ti->tt.module))
 			ti = NULL;
+		else
+			ti->use++;
 	}
-	read_unlock(&_lock);
 
+	read_unlock(&_lock);
 	return ti;
 }