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authorHans Verkuil <hans.verkuil@cisco.com>2011-06-13 23:55:58 +0200
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-27 22:53:31 +0200
commit77068d36d8b9e9902a89b4bb01011d41926f5420 (patch)
tree4fde4974ce56e52acac5c7c8d873d300e946adcc /drivers/media
parent[media] v4l2-events/fh: merge v4l2_events into v4l2_fh (diff)
downloadlinux-77068d36d8b9e9902a89b4bb01011d41926f5420.tar.xz
linux-77068d36d8b9e9902a89b4bb01011d41926f5420.zip
[media] v4l2-ctrls/event: remove struct v4l2_ctrl_fh, instead use v4l2_subscribed_event
The v4l2_ctrl_fh struct connected v4l2_ctrl with v4l2_fh so the control would know which filehandles subscribed to it. However, it is much easier to use struct v4l2_subscribed_event directly for that and get rid of that intermediate struct. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/v4l2-ctrls.c50
-rw-r--r--drivers/media/video/v4l2-event.c34
2 files changed, 31 insertions, 53 deletions
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index a5325611cb0e..b63fe2a17fce 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -581,15 +581,15 @@ static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 change
static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
{
struct v4l2_event ev;
- struct v4l2_ctrl_fh *pos;
+ struct v4l2_subscribed_event *sev;
- if (list_empty(&ctrl->fhs))
+ if (list_empty(&ctrl->ev_subs))
return;
fill_event(&ev, ctrl, changes);
- list_for_each_entry(pos, &ctrl->fhs, node)
- if (pos->fh != fh)
- v4l2_event_queue_fh(pos->fh, &ev);
+ list_for_each_entry(sev, &ctrl->ev_subs, node)
+ if (sev->fh && sev->fh != fh)
+ v4l2_event_queue_fh(sev->fh, &ev);
}
/* Helper function: copy the current control value back to the caller */
@@ -867,7 +867,7 @@ void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
{
struct v4l2_ctrl_ref *ref, *next_ref;
struct v4l2_ctrl *ctrl, *next_ctrl;
- struct v4l2_ctrl_fh *ctrl_fh, *next_ctrl_fh;
+ struct v4l2_subscribed_event *sev, *next_sev;
if (hdl == NULL || hdl->buckets == NULL)
return;
@@ -881,10 +881,8 @@ void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
/* Free all controls owned by the handler */
list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
list_del(&ctrl->node);
- list_for_each_entry_safe(ctrl_fh, next_ctrl_fh, &ctrl->fhs, node) {
- list_del(&ctrl_fh->node);
- kfree(ctrl_fh);
- }
+ list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
+ list_del(&sev->node);
kfree(ctrl);
}
kfree(hdl->buckets);
@@ -1084,7 +1082,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
}
INIT_LIST_HEAD(&ctrl->node);
- INIT_LIST_HEAD(&ctrl->fhs);
+ INIT_LIST_HEAD(&ctrl->ev_subs);
ctrl->handler = hdl;
ctrl->ops = ops;
ctrl->id = id;
@@ -2028,41 +2026,31 @@ int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
}
EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
-void v4l2_ctrl_add_fh(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ctrl_fh *ctrl_fh,
- struct v4l2_event_subscription *sub)
+void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl,
+ struct v4l2_subscribed_event *sev)
{
- struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, sub->id);
-
v4l2_ctrl_lock(ctrl);
- list_add_tail(&ctrl_fh->node, &ctrl->fhs);
+ list_add_tail(&sev->node, &ctrl->ev_subs);
if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
- (sub->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
+ (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
struct v4l2_event ev;
fill_event(&ev, ctrl, V4L2_EVENT_CTRL_CH_VALUE |
V4L2_EVENT_CTRL_CH_FLAGS);
- v4l2_event_queue_fh(ctrl_fh->fh, &ev);
+ v4l2_event_queue_fh(sev->fh, &ev);
}
v4l2_ctrl_unlock(ctrl);
}
-EXPORT_SYMBOL(v4l2_ctrl_add_fh);
+EXPORT_SYMBOL(v4l2_ctrl_add_event);
-void v4l2_ctrl_del_fh(struct v4l2_ctrl *ctrl, struct v4l2_fh *fh)
+void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl,
+ struct v4l2_subscribed_event *sev)
{
- struct v4l2_ctrl_fh *pos;
-
v4l2_ctrl_lock(ctrl);
- list_for_each_entry(pos, &ctrl->fhs, node) {
- if (pos->fh == fh) {
- list_del(&pos->node);
- kfree(pos);
- break;
- }
- }
+ list_del(&sev->node);
v4l2_ctrl_unlock(ctrl);
}
-EXPORT_SYMBOL(v4l2_ctrl_del_fh);
+EXPORT_SYMBOL(v4l2_ctrl_del_event);
int v4l2_ctrl_subscribe_fh(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub, unsigned n)
diff --git a/drivers/media/video/v4l2-event.c b/drivers/media/video/v4l2-event.c
index 70fa82daaca7..dc68f6085697 100644
--- a/drivers/media/video/v4l2-event.c
+++ b/drivers/media/video/v4l2-event.c
@@ -213,7 +213,6 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
{
struct v4l2_subscribed_event *sev, *found_ev;
struct v4l2_ctrl *ctrl = NULL;
- struct v4l2_ctrl_fh *ctrl_fh = NULL;
unsigned long flags;
if (sub->type == V4L2_EVENT_CTRL) {
@@ -222,17 +221,9 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
return -EINVAL;
}
- sev = kmalloc(sizeof(*sev), GFP_KERNEL);
+ sev = kzalloc(sizeof(*sev), GFP_KERNEL);
if (!sev)
return -ENOMEM;
- if (ctrl) {
- ctrl_fh = kzalloc(sizeof(*ctrl_fh), GFP_KERNEL);
- if (!ctrl_fh) {
- kfree(sev);
- return -ENOMEM;
- }
- ctrl_fh->fh = fh;
- }
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
@@ -241,22 +232,19 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
INIT_LIST_HEAD(&sev->list);
sev->type = sub->type;
sev->id = sub->id;
+ sev->fh = fh;
+ sev->flags = sub->flags;
list_add(&sev->list, &fh->subscribed);
- sev = NULL;
}
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
/* v4l2_ctrl_add_fh uses a mutex, so do this outside the spin lock */
- if (ctrl) {
- if (found_ev)
- kfree(ctrl_fh);
- else
- v4l2_ctrl_add_fh(fh->ctrl_handler, ctrl_fh, sub);
- }
-
- kfree(sev);
+ if (found_ev)
+ kfree(sev);
+ else if (ctrl)
+ v4l2_ctrl_add_event(ctrl, sev);
return 0;
}
@@ -298,15 +286,17 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh,
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
sev = v4l2_event_subscribed(fh, sub->type, sub->id);
- if (sev != NULL)
+ if (sev != NULL) {
list_del(&sev->list);
+ sev->fh = NULL;
+ }
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
- if (sev->type == V4L2_EVENT_CTRL) {
+ if (sev && sev->type == V4L2_EVENT_CTRL) {
struct v4l2_ctrl *ctrl = v4l2_ctrl_find(fh->ctrl_handler, sev->id);
if (ctrl)
- v4l2_ctrl_del_fh(ctrl, fh);
+ v4l2_ctrl_del_event(ctrl, sev);
}
kfree(sev);