diff options
Diffstat (limited to 'drivers/media/video/v4l2-event.c')
-rw-r--r-- | drivers/media/video/v4l2-event.c | 93 |
1 files changed, 25 insertions, 68 deletions
diff --git a/drivers/media/video/v4l2-event.c b/drivers/media/video/v4l2-event.c index 670f2f834e6a..70fa82daaca7 100644 --- a/drivers/media/video/v4l2-event.c +++ b/drivers/media/video/v4l2-event.c @@ -32,35 +32,11 @@ static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh); -int v4l2_event_init(struct v4l2_fh *fh) -{ - fh->events = kzalloc(sizeof(*fh->events), GFP_KERNEL); - if (fh->events == NULL) - return -ENOMEM; - - init_waitqueue_head(&fh->events->wait); - - INIT_LIST_HEAD(&fh->events->free); - INIT_LIST_HEAD(&fh->events->available); - INIT_LIST_HEAD(&fh->events->subscribed); - - fh->events->sequence = -1; - - return 0; -} -EXPORT_SYMBOL_GPL(v4l2_event_init); - int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n) { - struct v4l2_events *events = fh->events; unsigned long flags; - if (!events) { - WARN_ON(1); - return -ENOMEM; - } - - while (events->nallocated < n) { + while (fh->nallocated < n) { struct v4l2_kevent *kev; kev = kzalloc(sizeof(*kev), GFP_KERNEL); @@ -68,8 +44,8 @@ int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n) return -ENOMEM; spin_lock_irqsave(&fh->vdev->fh_lock, flags); - list_add_tail(&kev->list, &events->free); - events->nallocated++; + list_add_tail(&kev->list, &fh->free); + fh->nallocated++; spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); } @@ -87,40 +63,31 @@ EXPORT_SYMBOL_GPL(v4l2_event_alloc); void v4l2_event_free(struct v4l2_fh *fh) { - struct v4l2_events *events = fh->events; - - if (!events) - return; - - list_kfree(&events->free, struct v4l2_kevent, list); - list_kfree(&events->available, struct v4l2_kevent, list); + list_kfree(&fh->free, struct v4l2_kevent, list); + list_kfree(&fh->available, struct v4l2_kevent, list); v4l2_event_unsubscribe_all(fh); - - kfree(events); - fh->events = NULL; } EXPORT_SYMBOL_GPL(v4l2_event_free); static int __v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event) { - struct v4l2_events *events = fh->events; struct v4l2_kevent *kev; unsigned long flags; spin_lock_irqsave(&fh->vdev->fh_lock, flags); - if (list_empty(&events->available)) { + if (list_empty(&fh->available)) { spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); return -ENOENT; } - WARN_ON(events->navailable == 0); + WARN_ON(fh->navailable == 0); - kev = list_first_entry(&events->available, struct v4l2_kevent, list); - list_move(&kev->list, &events->free); - events->navailable--; + kev = list_first_entry(&fh->available, struct v4l2_kevent, list); + list_move(&kev->list, &fh->free); + fh->navailable--; - kev->event.pending = events->navailable; + kev->event.pending = fh->navailable; *event = kev->event; spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); @@ -131,7 +98,6 @@ static int __v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event) int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event, int nonblocking) { - struct v4l2_events *events = fh->events; int ret; if (nonblocking) @@ -142,8 +108,8 @@ int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event, mutex_unlock(fh->vdev->lock); do { - ret = wait_event_interruptible(events->wait, - events->navailable != 0); + ret = wait_event_interruptible(fh->wait, + fh->navailable != 0); if (ret < 0) break; @@ -161,12 +127,11 @@ EXPORT_SYMBOL_GPL(v4l2_event_dequeue); static struct v4l2_subscribed_event *v4l2_event_subscribed( struct v4l2_fh *fh, u32 type, u32 id) { - struct v4l2_events *events = fh->events; struct v4l2_subscribed_event *sev; assert_spin_locked(&fh->vdev->fh_lock); - list_for_each_entry(sev, &events->subscribed, list) { + list_for_each_entry(sev, &fh->subscribed, list) { if (sev->type == type && sev->id == id) return sev; } @@ -177,7 +142,6 @@ static struct v4l2_subscribed_event *v4l2_event_subscribed( static void __v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev, const struct timespec *ts) { - struct v4l2_events *events = fh->events; struct v4l2_subscribed_event *sev; struct v4l2_kevent *kev; @@ -187,24 +151,24 @@ static void __v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *e return; /* Increase event sequence number on fh. */ - events->sequence++; + fh->sequence++; /* Do we have any free events? */ - if (list_empty(&events->free)) + if (list_empty(&fh->free)) return; /* Take one and fill it. */ - kev = list_first_entry(&events->free, struct v4l2_kevent, list); + kev = list_first_entry(&fh->free, struct v4l2_kevent, list); kev->event.type = ev->type; kev->event.u = ev->u; kev->event.id = ev->id; kev->event.timestamp = *ts; - kev->event.sequence = events->sequence; - list_move_tail(&kev->list, &events->available); + kev->event.sequence = fh->sequence; + list_move_tail(&kev->list, &fh->available); - events->navailable++; + fh->navailable++; - wake_up_all(&events->wait); + wake_up_all(&fh->wait); } void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev) @@ -240,24 +204,18 @@ EXPORT_SYMBOL_GPL(v4l2_event_queue_fh); int v4l2_event_pending(struct v4l2_fh *fh) { - return fh->events->navailable; + return fh->navailable; } EXPORT_SYMBOL_GPL(v4l2_event_pending); int v4l2_event_subscribe(struct v4l2_fh *fh, struct v4l2_event_subscription *sub) { - struct v4l2_events *events = fh->events; struct v4l2_subscribed_event *sev, *found_ev; struct v4l2_ctrl *ctrl = NULL; struct v4l2_ctrl_fh *ctrl_fh = NULL; unsigned long flags; - if (fh->events == NULL) { - WARN_ON(1); - return -ENOMEM; - } - if (sub->type == V4L2_EVENT_CTRL) { ctrl = v4l2_ctrl_find(fh->ctrl_handler, sub->id); if (ctrl == NULL) @@ -284,7 +242,7 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, sev->type = sub->type; sev->id = sub->id; - list_add(&sev->list, &events->subscribed); + list_add(&sev->list, &fh->subscribed); sev = NULL; } @@ -306,7 +264,6 @@ EXPORT_SYMBOL_GPL(v4l2_event_subscribe); static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh) { - struct v4l2_events *events = fh->events; struct v4l2_event_subscription sub; struct v4l2_subscribed_event *sev; unsigned long flags; @@ -315,8 +272,8 @@ static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh) sev = NULL; spin_lock_irqsave(&fh->vdev->fh_lock, flags); - if (!list_empty(&events->subscribed)) { - sev = list_first_entry(&events->subscribed, + if (!list_empty(&fh->subscribed)) { + sev = list_first_entry(&fh->subscribed, struct v4l2_subscribed_event, list); sub.type = sev->type; sub.id = sev->id; |