[S390] 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: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index f65320babf71de9bc394ee2c7c6922d3d69fd415..29f848bfc12f4de027c0cb5de4904bb1ad884fdf 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;
 }