1 files changed, 19 insertions, 3 deletions

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 2375c0c3d1b..fb2eda08a09 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -378,6 +378,18 @@ static void populate_lancer_stats(struct be_adapter *adapter)
                                 pport_stats->rx_drops_too_many_frags_lo;
 }
 
+static void accumulate_16bit_val(u32 *acc, u16 val)
+{
+#define lo(x)                   (x & 0xFFFF)
+#define hi(x)                   (x & 0xFFFF0000)
+        bool wrapped = val < lo(*acc);
+        u32 newacc = hi(*acc) + val;
+
+        if (wrapped)
+                newacc += 65536;
+        ACCESS_ONCE(*acc) = newacc;
+}
+
 void be_parse_stats(struct be_adapter *adapter)
 {
         struct be_erx_stats_v1 *erx = be_erx_stats_from_cmd(adapter);
@@ -394,9 +406,13 @@ void be_parse_stats(struct be_adapter *adapter)
         }
 
         /* as erx_v1 is longer than v0, ok to use v1 defn for v0 access */
-        for_all_rx_queues(adapter, rxo, i)
-                rx_stats(rxo)->rx_drops_no_frags =
-                        erx->rx_drops_no_fragments[rxo->q.id];
+        for_all_rx_queues(adapter, rxo, i) {
+                /* below erx HW counter can actually wrap around after
+                 * 65535. Driver accumulates a 32-bit value
+                 */
+                accumulate_16bit_val(&rx_stats(rxo)->rx_drops_no_frags,
+                                (u16)erx->rx_drops_no_fragments[rxo->q.id]);
+        }
 }
 
 static struct rtnl_link_stats64 *be_get_stats64(struct net_device *netdev,