int cx18_v4l2_open(struct file *filp)
{
int res;
struct video_device *video_dev = video_devdata(filp);
struct cx18_stream *s = video_get_drvdata(video_dev);
struct cx18 *cx = s->cx;
mutex_lock(&cx->serialize_lock);
if (cx18_init_on_first_open(cx)) {
CX18_ERR("Failed to initialize on minor %d\n",
video_dev->minor);
mutex_unlock(&cx->serialize_lock);
return -ENXIO;
}
res = cx18_serialized_open(s, filp);
mutex_unlock(&cx->serialize_lock);
return res;
}
int cx18_v4l2_open(struct inode *inode, struct file *filp)
{
int res, x, y = 0;
struct cx18 *cx = NULL;
struct cx18_stream *s = NULL;
int minor = iminor(inode);
/* Find which card this open was on */
spin_lock(&cx18_cards_lock);
for (x = 0; cx == NULL && x < cx18_cards_active; x++) {
/* find out which stream this open was on */
for (y = 0; y < CX18_MAX_STREAMS; y++) {
if (cx18_cards[x] == NULL)
continue;
s = &cx18_cards[x]->streams[y];
if (s->v4l2dev && s->v4l2dev->minor == minor) {
cx = cx18_cards[x];
break;
}
}
}
spin_unlock(&cx18_cards_lock);
if (cx == NULL) {
/* Couldn't find a device registered
on that minor, shouldn't happen! */
printk(KERN_WARNING "No cx18 device found on minor %d\n",
minor);
return -ENXIO;
}
mutex_lock(&cx->serialize_lock);
if (cx18_init_on_first_open(cx)) {
CX18_ERR("Failed to initialize on minor %d\n", minor);
mutex_unlock(&cx->serialize_lock);
return -ENXIO;
}
res = cx18_serialized_open(s, filp);
mutex_unlock(&cx->serialize_lock);
return res;
}
