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[media] v4l2: make vidioc_(un)subscribe_event const

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Write-only ioctls should have a const argument in the ioctl op.
Do this conversion for vidioc_(un)subscribe_event.
Adding const for write-only ioctls was decided during the 2012 Media Workshop.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-09-04 11:46:09 -03:00 committed by Mauro Carvalho Chehab
parent ec6f432810
commit 85f5fe3962
9 changed files with 15 additions and 15 deletions
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2
drivers/media/pci/ivtv/ivtv-ioctl.c
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@ -1460,7 +1460,7 @@ static int ivtv_overlay(struct file *file, void *fh, unsigned int on)
return 0;
}
static int ivtv_subscribe_event(struct v4l2_fh *fh, struct v4l2_event_subscription *sub)
static int ivtv_subscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_VSYNC:

4
drivers/media/platform/omap3isp/ispccdc.c
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@ -1706,7 +1706,7 @@ static long ccdc_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
}
static int ccdc_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
if (sub->type != V4L2_EVENT_FRAME_SYNC)
return -EINVAL;
@ -1719,7 +1719,7 @@ static int ccdc_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
}
static int ccdc_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
return v4l2_event_unsubscribe(fh, sub);
}

4
drivers/media/platform/omap3isp/ispstat.c
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@ -1025,7 +1025,7 @@ void omap3isp_stat_dma_isr(struct ispstat *stat)
int omap3isp_stat_subscribe_event(struct v4l2_subdev *subdev,
struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
struct ispstat *stat = v4l2_get_subdevdata(subdev);
@ -1037,7 +1037,7 @@ int omap3isp_stat_subscribe_event(struct v4l2_subdev *subdev,
int omap3isp_stat_unsubscribe_event(struct v4l2_subdev *subdev,
struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
return v4l2_event_unsubscribe(fh, sub);
}

4
drivers/media/platform/omap3isp/ispstat.h
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@ -147,10 +147,10 @@ int omap3isp_stat_init(struct ispstat *stat, const char *name,
void omap3isp_stat_cleanup(struct ispstat *stat);
int omap3isp_stat_subscribe_event(struct v4l2_subdev *subdev,
struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
int omap3isp_stat_unsubscribe_event(struct v4l2_subdev *subdev,
struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
int omap3isp_stat_s_stream(struct v4l2_subdev *subdev, int enable);
int omap3isp_stat_busy(struct ispstat *stat);

2
drivers/media/v4l2-core/v4l2-ctrls.c
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@ -2699,7 +2699,7 @@ int v4l2_ctrl_log_status(struct file *file, void *fh)
EXPORT_SYMBOL(v4l2_ctrl_log_status);
int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
if (sub->type == V4L2_EVENT_CTRL)
return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);

4
drivers/media/v4l2-core/v4l2-event.c
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@ -203,7 +203,7 @@ int v4l2_event_pending(struct v4l2_fh *fh)
EXPORT_SYMBOL_GPL(v4l2_event_pending);
int v4l2_event_subscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub, unsigned elems,
const struct v4l2_event_subscription *sub, unsigned elems,
const struct v4l2_subscribed_event_ops *ops)
{
struct v4l2_subscribed_event *sev, *found_ev;
@ -278,7 +278,7 @@ void v4l2_event_unsubscribe_all(struct v4l2_fh *fh)
EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe_all);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
const struct v4l2_event_subscription *sub)
{
struct v4l2_subscribed_event *sev;
unsigned long flags;

2
include/media/v4l2-ctrls.h
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@ -546,7 +546,7 @@ int v4l2_ctrl_log_status(struct file *file, void *fh);
/* Can be used as a vidioc_subscribe_event function that just subscribes
control events. */
int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
/* Can be used as a poll function that just polls for control events. */
unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait);

4
include/media/v4l2-event.h
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@ -124,10 +124,10 @@ void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev);
void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev);
int v4l2_event_pending(struct v4l2_fh *fh);
int v4l2_event_subscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub, unsigned elems,
const struct v4l2_event_subscription *sub, unsigned elems,
const struct v4l2_subscribed_event_ops *ops);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
#endif /* V4L2_EVENT_H */

4
include/media/v4l2-ioctl.h
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@ -273,9 +273,9 @@ struct v4l2_ioctl_ops {
struct v4l2_dv_timings_cap *cap);
int (*vidioc_subscribe_event) (struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
const struct v4l2_event_subscription *sub);
/* For other private ioctls */
long (*vidioc_default) (struct file *file, void *fh,