1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 45864461aab6..1f7fb541ec54 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -2040,10 +2040,12 @@ static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
 {
         u32 cur;
 
-        for (cur = start; end - cur > 0; cur++) {
+        for (cur = start; end - cur != 0; cur++) {
                 struct sk_buff *skb;
                 unsigned int i = cur % NUM_RX_DESC;
 
+                WARN_ON((s32)(end - cur) < 0);
+
                 if (tp->Rx_skbuff[i])
                         continue;