1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/s390/net/qeth_sys.c b/drivers/s390/net/qeth_sys.c
index c1f3187f37ea..5836737ac58f 100644
--- a/drivers/s390/net/qeth_sys.c
+++ b/drivers/s390/net/qeth_sys.c
@@ -743,6 +743,47 @@ static DEVICE_ATTR(layer2, 0644, qeth_dev_layer2_show,
                    qeth_dev_layer2_store);
 
 static ssize_t
+qeth_dev_performance_stats_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct qeth_card *card = dev->driver_data;
+
+        if (!card)
+                return -EINVAL;
+
+        return sprintf(buf, "%i\n", card->options.performance_stats ? 1:0);
+}
+
+static ssize_t
+qeth_dev_performance_stats_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct qeth_card *card = dev->driver_data;
+        char *tmp;
+        int i;
+
+        if (!card)
+                return -EINVAL;
+
+        i = simple_strtoul(buf, &tmp, 16);
+        if ((i == 0) || (i == 1)) {
+                if (i == card->options.performance_stats)
+                        return count;
+                card->options.performance_stats = i;
+                if (i == 0)
+                        memset(&card->perf_stats, 0,
+                                sizeof(struct qeth_perf_stats));
+                card->perf_stats.initial_rx_packets = card->stats.rx_packets;
+                card->perf_stats.initial_tx_packets = card->stats.tx_packets;
+        } else {
+                PRINT_WARN("performance_stats: write 0 or 1 to this file!\n");
+                return -EINVAL;
+        }
+        return count;
+}
+
+static DEVICE_ATTR(performance_stats, 0644, qeth_dev_performance_stats_show,
+                   qeth_dev_performance_stats_store);
+
+static ssize_t
 qeth_dev_large_send_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
         struct qeth_card *card = dev->driver_data;
@@ -928,6 +969,7 @@ static struct device_attribute * qeth_device_attrs[] = {
         &dev_attr_canonical_macaddr,
         &dev_attr_layer2,
         &dev_attr_large_send,
+        &dev_attr_performance_stats,
         NULL,
 };