Esempi in C++ (Cpp) per balance_ref_count

Esempio n. 1

File: dmaengine.c Progetto: adis1313/android_kernel_samsung_msm8974

/**
 * dma_chan_get - try to grab a dma channel's parent driver module
 * @chan - channel to grab
 *
 * Must be called under dma_list_mutex
 */
static int dma_chan_get(struct dma_chan *chan)
{
	int err = -ENODEV;
	struct module *owner = dma_chan_to_owner(chan);

	if (chan->client_count) {
		__module_get(owner);
		err = 0;
	} else if (try_module_get(owner))
		err = 0;

	if (err == 0)
		chan->client_count++;

	/* allocate upon first client reference */
	if (chan->client_count == 1 && err == 0) {
		int desc_cnt = chan->device->device_alloc_chan_resources(chan);

		if (desc_cnt < 0) {
			err = desc_cnt;
			chan->client_count = 0;
			module_put(owner);
		} else if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask))
			balance_ref_count(chan);
	}

	return err;
}

Esempio n. 2

File: dmaengine.c Progetto: Abhi1919/ath

/**
 * dma_chan_get - try to grab a dma channel's parent driver module
 * @chan - channel to grab
 *
 * Must be called under dma_list_mutex
 */
static int dma_chan_get(struct dma_chan *chan)
{
	struct module *owner = dma_chan_to_owner(chan);
	int ret;

	/* The channel is already in use, update client count */
	if (chan->client_count) {
		__module_get(owner);
		goto out;
	}

	if (!try_module_get(owner))
		return -ENODEV;

	/* allocate upon first client reference */
	if (chan->device->device_alloc_chan_resources) {
		ret = chan->device->device_alloc_chan_resources(chan);
		if (ret < 0)
			goto err_out;
	}

	if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask))
		balance_ref_count(chan);

out:
	chan->client_count++;
	return 0;

err_out:
	module_put(owner);
	return ret;
}