The variable rc is only assigned the values true and false.
The function bnx2x_prev_is_path_marked already returns bool.
Change rc type to bool.
The simplified semantic patch that find this problem is as
follows (http://coccinelle.lip6.fr/):
@exists@
type T;
identifier b;
@@
- T
+ bool
  b = ...;
  ... when any
  b = \(true\|false\)
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 static bool bnx2x_prev_is_path_marked(struct bnx2x *bp)
 {
        struct bnx2x_prev_path_list *tmp_list;
-       int rc = false;
+       bool rc = false;
 
        if (down_trylock(&bnx2x_prev_sem))
                return false;