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-rw-r--r--drivers/media/video/ivtv/ivtv-fileops.c6
-rw-r--r--drivers/media/video/v4l2-ctrls.c2
-rw-r--r--drivers/media/video/v4l2-event.c93
-rw-r--r--drivers/media/video/v4l2-fh.c17
-rw-r--r--drivers/media/video/v4l2-subdev.c10
-rw-r--r--drivers/media/video/vivi.c2
-rw-r--r--drivers/usb/gadget/uvc_v4l2.c10
-rw-r--r--include/media/v4l2-event.h11
-rw-r--r--include/media/v4l2-fh.h13
9 files changed, 49 insertions, 115 deletions
diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index 353142d..d4275d2 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -722,8 +722,8 @@ unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
/* If there are subscribed events, then only use the new event
API instead of the old video.h based API. */
- if (!list_empty(&id->fh.events->subscribed)) {
- poll_wait(filp, &id->fh.events->wait, wait);
+ if (!list_empty(&id->fh.subscribed)) {
+ poll_wait(filp, &id->fh.wait, wait);
/* Turn off the old-style vsync events */
clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
if (v4l2_event_pending(&id->fh))
@@ -773,7 +773,7 @@ unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait)
if (v4l2_event_pending(&id->fh))
res |= POLLPRI;
else
- poll_wait(filp, &id->fh.events->wait, wait);
+ poll_wait(filp, &id->fh.wait, wait);
if (s->q_full.length || s->q_io.length)
return res | POLLIN | POLLRDNORM;
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index 1bbaed6..a532561 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -2070,8 +2070,6 @@ int v4l2_ctrl_subscribe_fh(struct v4l2_fh *fh,
struct v4l2_ctrl_handler *hdl = fh->ctrl_handler;
int ret = 0;
- if (!fh->events)
- ret = v4l2_event_init(fh);
if (!ret) {
if (hdl->nr_of_refs * 2 > n)
n = hdl->nr_of_refs * 2;
diff --git a/drivers/media/video/v4l2-event.c b/drivers/media/video/v4l2-event.c
index 670f2f8..70fa82d 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;
diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c
index c6aef84..333b8c8 100644
--- a/drivers/media/video/v4l2-fh.c
+++ b/drivers/media/video/v4l2-fh.c
@@ -29,7 +29,7 @@
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
-int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
+void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
{
fh->vdev = vdev;
/* Inherit from video_device. May be overridden by the driver. */
@@ -38,16 +38,11 @@ int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
fh->prio = V4L2_PRIORITY_UNSET;
- /*
- * fh->events only needs to be initialized if the driver
- * supports the VIDIOC_SUBSCRIBE_EVENT ioctl.
- */
- if (vdev->ioctl_ops && vdev->ioctl_ops->vidioc_subscribe_event)
- return v4l2_event_init(fh);
-
- fh->events = NULL;
-
- return 0;
+ init_waitqueue_head(&fh->wait);
+ INIT_LIST_HEAD(&fh->free);
+ INIT_LIST_HEAD(&fh->available);
+ INIT_LIST_HEAD(&fh->subscribed);
+ fh->sequence = -1;
}
EXPORT_SYMBOL_GPL(v4l2_fh_init);
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c
index fd5dcca..3b67a85 100644
--- a/drivers/media/video/v4l2-subdev.c
+++ b/drivers/media/video/v4l2-subdev.c
@@ -75,15 +75,9 @@ static int subdev_open(struct file *file)
return ret;
}
- ret = v4l2_fh_init(&subdev_fh->vfh, vdev);
- if (ret)
- goto err;
+ v4l2_fh_init(&subdev_fh->vfh, vdev);
if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) {
- ret = v4l2_event_init(&subdev_fh->vfh);
- if (ret)
- goto err;
-
ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents);
if (ret)
goto err;
@@ -297,7 +291,7 @@ static unsigned int subdev_poll(struct file *file, poll_table *wait)
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
return POLLERR;
- poll_wait(file, &fh->events->wait, wait);
+ poll_wait(file, &fh->wait, wait);
if (v4l2_event_pending(fh))
return POLLPRI;
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index e81c106..1b90713 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -1046,7 +1046,7 @@ vivi_poll(struct file *file, struct poll_table_struct *wait)
if (v4l2_event_pending(fh))
res |= POLLPRI;
else
- poll_wait(file, &fh->events->wait, wait);
+ poll_wait(file, &fh->wait, wait);
return res;
}
diff --git a/drivers/usb/gadget/uvc_v4l2.c b/drivers/usb/gadget/uvc_v4l2.c
index 5e807f0..5582870 100644
--- a/drivers/usb/gadget/uvc_v4l2.c
+++ b/drivers/usb/gadget/uvc_v4l2.c
@@ -130,13 +130,7 @@ uvc_v4l2_open(struct file *file)
if (handle == NULL)
return -ENOMEM;
- ret = v4l2_fh_init(&handle->vfh, vdev);
- if (ret < 0)
- goto error;
-
- ret = v4l2_event_init(&handle->vfh);
- if (ret < 0)
- goto error;
+ v4l2_fh_init(&handle->vfh, vdev);
ret = v4l2_event_alloc(&handle->vfh, 8);
if (ret < 0)
@@ -354,7 +348,7 @@ uvc_v4l2_poll(struct file *file, poll_table *wait)
struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
unsigned int mask = 0;
- poll_wait(file, &handle->vfh.events->wait, wait);
+ poll_wait(file, &handle->vfh.wait, wait);
if (v4l2_event_pending(&handle->vfh))
mask |= POLLPRI;
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index 45e9c1e..042b893 100644
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -43,17 +43,6 @@ struct v4l2_subscribed_event {
u32 id;
};
-struct v4l2_events {
- wait_queue_head_t wait;
- struct list_head subscribed; /* Subscribed events */
- struct list_head free; /* Events ready for use */
- struct list_head available; /* Dequeueable event */
- unsigned int navailable;
- unsigned int nallocated; /* Number of allocated events */
- u32 sequence;
-};
-
-int v4l2_event_init(struct v4l2_fh *fh);
int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n);
void v4l2_event_free(struct v4l2_fh *fh);
int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event,
diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h
index d247111..bfc0457 100644
--- a/include/media/v4l2-fh.h
+++ b/include/media/v4l2-fh.h
@@ -29,15 +29,22 @@
#include <linux/list.h>
struct video_device;
-struct v4l2_events;
struct v4l2_ctrl_handler;
struct v4l2_fh {
struct list_head list;
struct video_device *vdev;
- struct v4l2_events *events; /* events, pending and subscribed */
struct v4l2_ctrl_handler *ctrl_handler;
enum v4l2_priority prio;
+
+ /* Events */
+ wait_queue_head_t wait;
+ struct list_head subscribed; /* Subscribed events */
+ struct list_head free; /* Events ready for use */
+ struct list_head available; /* Dequeueable event */
+ unsigned int navailable;
+ unsigned int nallocated; /* Number of allocated events */
+ u32 sequence;
};
/*
@@ -46,7 +53,7 @@ struct v4l2_fh {
* from driver's v4l2_file_operations->open() handler if the driver
* uses v4l2_fh.
*/
-int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev);
+void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev);
/*
* Add the fh to the list of file handles on a video_device. The file
* handle must be initialised first.
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