C++ (Cpp) clear_dma_buffer Examples

Example #1

File: bfin_dma.c Project: Blackburn29/PsycoKernel

void free_dma(unsigned int channel)
{
	pr_debug("freedma() : BEGIN\n");
	BUG_ON(channel >= MAX_DMA_CHANNELS ||
			!atomic_read(&dma_ch[channel].chan_status));

	
	disable_dma(channel);
	clear_dma_buffer(channel);

	if (dma_ch[channel].irq)
		free_irq(dma_ch[channel].irq, dma_ch[channel].data);

	
	atomic_set(&dma_ch[channel].chan_status, 0);

	pr_debug("freedma() : END\n");
}

Example #2

File: bfin_dma_5xx.c Project: 0x0f/adam-kernel

void free_dma(unsigned int channel)
{
	pr_debug("freedma() : BEGIN \n");
	BUG_ON(channel >= MAX_DMA_CHANNELS ||
			dma_ch[channel].chan_status == DMA_CHANNEL_FREE);

	/* Halt the DMA */
	disable_dma(channel);
	clear_dma_buffer(channel);

	if (dma_ch[channel].irq)
		free_irq(dma_ch[channel].irq, dma_ch[channel].data);

	/* Clear the DMA Variable in the Channel */
	mutex_lock(&(dma_ch[channel].dmalock));
	dma_ch[channel].chan_status = DMA_CHANNEL_FREE;
	mutex_unlock(&(dma_ch[channel].dmalock));

	pr_debug("freedma() : END \n");
}

Example #3

File: bfin_dma_5xx.c Project: PennPanda/linux-repo

void free_dma(unsigned int channel)
{
	int ret_irq;

	pr_debug("freedma() : BEGIN \n");
	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
	       && channel < MAX_BLACKFIN_DMA_CHANNEL));

	/* Halt the DMA */
	disable_dma(channel);
	clear_dma_buffer(channel);

	if (dma_ch[channel].irq_callback != NULL) {
		ret_irq = channel2irq(channel);
		free_irq(ret_irq, dma_ch[channel].data);
	}

	/* Clear the DMA Variable in the Channel */
	mutex_lock(&(dma_ch[channel].dmalock));
	dma_ch[channel].chan_status = DMA_CHANNEL_FREE;
	mutex_unlock(&(dma_ch[channel].dmalock));

	pr_debug("freedma() : END \n");
}