diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dp_aux_dev.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_aux_dev.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c index 053044201e31..0e4f25d63fd2 100644 --- a/drivers/gpu/drm/drm_dp_aux_dev.c +++ b/drivers/gpu/drm/drm_dp_aux_dev.c @@ -177,8 +177,9 @@ static ssize_t auxdev_read_iter(struct kiocb *iocb, struct iov_iter *to) res = pos - iocb->ki_pos; iocb->ki_pos = pos; - atomic_dec(&aux_dev->usecount); - wake_up_atomic_t(&aux_dev->usecount); + if (atomic_dec_and_test(&aux_dev->usecount)) + wake_up_var(&aux_dev->usecount); + return res; } @@ -218,8 +219,9 @@ static ssize_t auxdev_write_iter(struct kiocb *iocb, struct iov_iter *from) res = pos - iocb->ki_pos; iocb->ki_pos = pos; - atomic_dec(&aux_dev->usecount); - wake_up_atomic_t(&aux_dev->usecount); + if (atomic_dec_and_test(&aux_dev->usecount)) + wake_up_var(&aux_dev->usecount); + return res; } @@ -277,8 +279,7 @@ void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux) mutex_unlock(&aux_idr_mutex); atomic_dec(&aux_dev->usecount); - wait_on_atomic_t(&aux_dev->usecount, atomic_t_wait, - TASK_UNINTERRUPTIBLE); + wait_var_event(&aux_dev->usecount, !atomic_read(&aux_dev->usecount)); minor = aux_dev->index; if (aux_dev->dev) |