node-drivers/base-driver/drivers/vca/plx87xx/plx_main.c
static void plx_free_dma_chan(struct plx_device *xdev)
{
	if (xdev->dma_ch) {
		dma_release_channel(xdev->dma_ch);
		xdev->dma_ch = NULL;
	}
}
/**
 * plx_free_dma_chan - release DMA channel
 * @xdev: pointer to plx_device instance
 *
 * returns none
 */
release DMA channel
@xdev: pointer to plx_device instance

returns none
release DMA channel @xdev : pointer to plx_device instance returns none
static void plx_free_dma_chan(struct plx_device *xdev)
{
	if (xdev->dma_ch) {
		dma_release_channel(xdev->dma_ch);
		xdev->dma_ch = NULL;
	}
}
static void plx_free_dma_chan ( struct plx_device * xdev ) { if ( xdev -> dma_ch ) { dma_release_channel ( xdev -> dma_ch ) ; xdev -> dma_ch = NULL ; } }
plx_free_dma_chan - release DMA channel
 @xdev: pointer to plx_device instance
plx_free_dma_chan - release DMA channel @xdev : pointer to plx_device instance