macb: Add rx overrun counter

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 2cb4e792f871..629bd2649c0c 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -576,6 +576,11 @@ static irqreturn_t macb_interrupt(int irq, void *dev_id)
                  * add that if/when we get our hands on a full-blown MII PHY.
                  */
 
+                if (status & MACB_BIT(ISR_ROVR)) {
+                        /* We missed at least one packet */
+                        bp->hw_stats.rx_overruns++;
+                }
+
                 if (status & MACB_BIT(HRESP)) {
                         /*
                          * TODO: Reset the hardware, and maybe move the printk
@@ -1024,7 +1029,8 @@ static struct net_device_stats *macb_get_stats(struct net_device *dev)
                                    hwstat->rx_jabbers +
                                    hwstat->rx_undersize_pkts +
                                    hwstat->rx_length_mismatch);
-        nstat->rx_over_errors = hwstat->rx_resource_errors;
+        nstat->rx_over_errors = hwstat->rx_resource_errors +
+                                   hwstat->rx_overruns;
         nstat->rx_crc_errors = hwstat->rx_fcs_errors;
         nstat->rx_frame_errors = hwstat->rx_align_errors;
         nstat->rx_fifo_errors = hwstat->rx_overruns;