From eddf0d5b31dda679a98f3e5615a510b8f065cb5d Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 16 Sep 2013 06:59:50 +0200 Subject: s390/qdio: fix atomic_sub() misusage get_inbound_buffer_frontier() makes use of the return value of atomic_sub() which shouldn't work, since atomic_sub() is supposed to return void. This only works on s390 because atomic_sub() gets mapped to atomic_sub_return() with a define without changing it's return value to void. So use atomic_sub_return() instead of atomic_sub() in qeth code before fixing atomic ops. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/qdio_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/s390/cio') diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index bbd3e511c771..3e602e8affa7 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -528,7 +528,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q) case SLSB_P_INPUT_PRIMED: inbound_primed(q, count); q->first_to_check = add_buf(q->first_to_check, count); - if (atomic_sub(count, &q->nr_buf_used) == 0) + if (atomic_sub_return(count, &q->nr_buf_used) == 0) qperf_inc(q, inbound_queue_full); if (q->irq_ptr->perf_stat_enabled) account_sbals(q, count); -- cgit v1.2.3