diff options
| -rw-r--r-- | drivers/s390/cio/qdio_thinint.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c index c61164f4528e..3e587bf426b0 100644 --- a/drivers/s390/cio/qdio_thinint.c +++ b/drivers/s390/cio/qdio_thinint.c @@ -56,10 +56,8 @@ static u32 *get_indicator(void) int i; for (i = 0; i < TIQDIO_NR_NONSHARED_IND; i++) - if (!atomic_read(&q_indicators[i].count)) { - atomic_set(&q_indicators[i].count, 1); + if (!atomic_cmpxchg(&q_indicators[i].count, 0, 1)) return &q_indicators[i].ind; - } /* use the shared indicator */ atomic_inc(&q_indicators[TIQDIO_SHARED_IND].count); |