diff options
Diffstat (limited to 'drivers/media/video/v4l2-event.c')
| -rw-r--r-- | drivers/media/video/v4l2-event.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/media/video/v4l2-event.c b/drivers/media/video/v4l2-event.c index 53b190cf225..c26ad963714 100644 --- a/drivers/media/video/v4l2-event.c +++ b/drivers/media/video/v4l2-event.c @@ -29,6 +29,7 @@ #include <linux/sched.h> #include <linux/slab.h> +#include <linux/export.h> static unsigned sev_pos(const struct v4l2_subscribed_event *sev, unsigned idx) { @@ -215,6 +216,9 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, unsigned long flags; unsigned i; + if (sub->type == V4L2_EVENT_ALL) + return -EINVAL; + if (elems < 1) elems = 1; if (sub->type == V4L2_EVENT_CTRL) { @@ -282,6 +286,7 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh, { struct v4l2_subscribed_event *sev; unsigned long flags; + int i; if (sub->type == V4L2_EVENT_ALL) { v4l2_event_unsubscribe_all(fh); @@ -292,8 +297,12 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh, sev = v4l2_event_subscribed(fh, sub->type, sub->id); if (sev != NULL) { + /* Remove any pending events for this subscription */ + for (i = 0; i < sev->in_use; i++) { + list_del(&sev->events[sev_pos(sev, i)].list); + fh->navailable--; + } list_del(&sev->list); - sev->fh = NULL; } spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); |