memset(cam, 0, sizeof(struct camera_data));
cam->present = 1;
- init_MUTEX(&cam->busy_lock);
+ mutex_init(&cam->busy_lock);
init_waitqueue_head(&cam->wq_stream);
return cam;
}
/* make this _really_ smp and multithread-safe */
- if (down_interruptible(&cam->busy_lock))
+ if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS;
if (!cam->present) {
LOG("%s: camera removed\n",__FUNCTION__);
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return 0; /* EOF */
}
/* Copy cam->curbuff in case it changes while we're processing */
frame = cam->curbuff;
if (noblock && frame->status != FRAME_READY) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -EAGAIN;
}
if(frame->status != FRAME_READY) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream,
!cam->present ||
(frame = cam->curbuff)->status == FRAME_READY);
if (signal_pending(current))
return -ERESTARTSYS;
/* make this _really_ smp and multithread-safe */
- if (down_interruptible(&cam->busy_lock)) {
+ if (mutex_lock_interruptible(&cam->busy_lock)) {
return -ERESTARTSYS;
}
if(!cam->present) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return 0;
}
}
/* copy data to user space */
if (frame->length > count) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -EFAULT;
}
if (copy_to_user(buf, frame->data, frame->length)) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -EFAULT;
}
frame->status = FRAME_EMPTY;
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return count;
}
return POLLERR;
}
- down(&cam->busy_lock);
+ mutex_lock(&cam->busy_lock);
if(!cam->present) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return POLLHUP;
}
cam->params.camera_state.stream_mode);
}
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
poll_wait(filp, &cam->wq_stream, wait);
- down(&cam->busy_lock);
+ mutex_lock(&cam->busy_lock);
if(!cam->present)
status = POLLHUP;
else if(cam->curbuff->status == FRAME_READY)
status = POLLIN | POLLRDNORM;
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return status;
}
DBG("mmap offset:%ld size:%ld\n", start_offset, size);
/* make this _really_ smp-safe */
- if (down_interruptible(&cam->busy_lock))
+ if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS;
if (!cam->present) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -ENODEV;
}
if (size > cam->frame_size*cam->num_frames ||
(start_offset % cam->frame_size) != 0 ||
(start_offset+size > cam->frame_size*cam->num_frames)) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -EINVAL;
}
while (size > 0) {
page = kvirt_to_pa(pos);
if (remap_pfn_range(vma, start, page >> PAGE_SHIFT, PAGE_SIZE, PAGE_SHARED)) {
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return -EAGAIN;
}
start += PAGE_SIZE;
}
cam->mmapped = true;
- up(&cam->busy_lock);
+ mutex_unlock(&cam->busy_lock);
return 0;
}