qeth: buffer count imbalance

The used buffers counter is not incremented in case of an error so
the counter can become negative. Increment the used buffers counter
before checking for errors.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index e6b2df0e73f56a4b143365be8302875c600c49bc..b7d9dc0adc62651159944e76daafd5e26013cafc 100644 (file)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2840,6 +2840,7 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
                queue->card->perf_stats.outbound_do_qdio_time +=
                        qeth_get_micros() -
                        queue->card->perf_stats.outbound_do_qdio_start_time;
+       atomic_add(count, &queue->used_buffers);
        if (rc) {
                queue->card->stats.tx_errors += count;
                /* ignore temporary SIGA errors without busy condition */
@@ -2853,7 +2854,6 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
                qeth_schedule_recovery(queue->card);
                return;
        }
-       atomic_add(count, &queue->used_buffers);
        if (queue->card->options.performance_stats)
                queue->card->perf_stats.bufs_sent += count;
 }