C++ (Cpp) isp_stat_buf_release Examples

Example #1

File: ispstat.c Project: AshishNamdev/linux

/* Get buffer to userspace. */
static struct ispstat_buffer *isp_stat_buf_get(struct ispstat *stat,
					       struct omap3isp_stat_data *data)
{
	int rval = 0;
	unsigned long flags;
	struct ispstat_buffer *buf;

	spin_lock_irqsave(&stat->isp->stat_lock, flags);

	while (1) {
		buf = isp_stat_buf_find_oldest(stat);
		if (!buf) {
			spin_unlock_irqrestore(&stat->isp->stat_lock, flags);
			dev_dbg(stat->isp->dev, "%s: cannot find a buffer.\n",
				stat->subdev.name);
			return ERR_PTR(-EBUSY);
		}
		if (isp_stat_buf_check_magic(stat, buf)) {
			dev_dbg(stat->isp->dev,
				"%s: current buffer has corrupted data\n.",
				stat->subdev.name);
			/* Mark empty because it doesn't have valid data. */
			buf->empty = 1;
		} else {
			/* Buffer isn't corrupted. */
			break;
		}
	}

	stat->locked_buf = buf;

	spin_unlock_irqrestore(&stat->isp->stat_lock, flags);

	if (buf->buf_size > data->buf_size) {
		dev_warn(stat->isp->dev,
			 "%s: userspace's buffer size is not enough.\n",
			 stat->subdev.name);
		isp_stat_buf_release(stat);
		return ERR_PTR(-EINVAL);
	}

	isp_stat_buf_sync_for_cpu(stat, buf);

	rval = copy_to_user(data->buf,
			    buf->virt_addr,
			    buf->buf_size);

	if (rval) {
		dev_info(stat->isp->dev,
			 "%s: failed copying %d bytes of stat data\n",
			 stat->subdev.name, rval);
		buf = ERR_PTR(-EFAULT);
		isp_stat_buf_release(stat);
	}

	return buf;
}

Example #2

File: ispstat.c Project: Astralix/mainline-dss11

/*
 * omap3isp_stat_request_statistics - Request statistics.
 * @data: Pointer to return statistics data.
 *
 * Returns 0 if successful.
 */
int omap3isp_stat_request_statistics(struct ispstat *stat,
				     struct omap3isp_stat_data *data)
{
	struct ispstat_buffer *buf;

	if (stat->state != ISPSTAT_ENABLED) {
		dev_dbg(stat->isp->dev, "%s: engine not enabled.\n",
			stat->subdev.name);
		return -EINVAL;
	}

	mutex_lock(&stat->ioctl_lock);
	buf = isp_stat_buf_get(stat, data);
	if (IS_ERR(buf)) {
		mutex_unlock(&stat->ioctl_lock);
		return PTR_ERR(buf);
	}

	data->ts.tv_sec = buf->ts.tv_sec;
	data->ts.tv_usec = buf->ts.tv_nsec / NSEC_PER_USEC;
	data->config_counter = buf->config_counter;
	data->frame_number = buf->frame_number;
	data->buf_size = buf->buf_size;

	buf->empty = 1;
	isp_stat_buf_release(stat);
	mutex_unlock(&stat->ioctl_lock);

	return 0;
}