net_sched: red: Avoid illegal values

[linux-2.6-microblaze.git] / include / net / red.h

diff --git a/include/net/red.h b/include/net/red.h
index 5918f78..9665582 100644 (file)
--- a/include/net/red.h
+++ b/include/net/red.h
@@ -168,6 +168,17 @@ static inline void red_set_vars(struct red_vars *v)
        v->qcount       = -1;
 }
 
+static inline bool red_check_params(u32 qth_min, u32 qth_max, u8 Wlog)
+{
+       if (fls(qth_min) + Wlog > 32)
+               return false;
+       if (fls(qth_max) + Wlog > 32)
+               return false;
+       if (qth_max < qth_min)
+               return false;
+       return true;
+}
+
 static inline void red_set_parms(struct red_parms *p,
                                 u32 qth_min, u32 qth_max, u8 Wlog, u8 Plog,
                                 u8 Scell_log, u8 *stab, u32 max_P)