Commit e222822f authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David S. Miller
Browse files

net: caif: pass struct device to DMA API functions 



The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons.  Pass the easily
available struct device from the platform_device to remedy this.

Also use the proper Kconfig symbol to check for DMA API availability.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 99e13114

drivers/net/caif/caif_spi.c

+16 −14
Original line number Diff line number Diff line
@@ -73,35 +73,37 @@ MODULE_PARM_DESC(spi_down_tail_align, "SPI downlink tail alignment."); 
#define LOW_WATER_MARK   100

#define HIGH_WATER_MARK  (LOW_WATER_MARK*5)



#ifdef CONFIG_UML

#ifndef CONFIG_HAS_DMA



/*

 * We sometimes use UML for debugging, but it cannot handle

 * dma_alloc_coherent so we have to wrap it.

 */

static inline void *dma_alloc(dma_addr_t *daddr)

static inline void *dma_alloc(struct cfspi *cfspi, dma_addr_t *daddr)

{

	return kmalloc(SPI_DMA_BUF_LEN, GFP_KERNEL);

}



static inline void dma_free(void *cpu_addr, dma_addr_t handle)

static inline void dma_free(struct cfspi *cfspi, void *cpu_addr,

		dma_addr_t handle)

{

	kfree(cpu_addr);

}



#else



static inline void *dma_alloc(dma_addr_t *daddr)

static inline void *dma_alloc(struct cfspi *cfspi, dma_addr_t *daddr)

{

	return dma_alloc_coherent(NULL, SPI_DMA_BUF_LEN, daddr,

	return dma_alloc_coherent(&cfspi->pdev->dev, SPI_DMA_BUF_LEN, daddr,

				GFP_KERNEL);

}



static inline void dma_free(void *cpu_addr, dma_addr_t handle)

static inline void dma_free(struct cfspi *cfspi, void *cpu_addr,

		dma_addr_t handle)

{

	dma_free_coherent(NULL, SPI_DMA_BUF_LEN, cpu_addr, handle);

	dma_free_coherent(&cfspi->pdev->dev, SPI_DMA_BUF_LEN, cpu_addr, handle);

}

#endif	/* CONFIG_UML */

#endif	/* CONFIG_HAS_DMA */



#ifdef CONFIG_DEBUG_FS
@@ -610,13 +612,13 @@ static int cfspi_init(struct net_device *dev) 
	}



	/* Allocate DMA buffers. */

	cfspi->xfer.va_tx[0] = dma_alloc(&cfspi->xfer.pa_tx[0]);

	cfspi->xfer.va_tx[0] = dma_alloc(cfspi, &cfspi->xfer.pa_tx[0]);

	if (!cfspi->xfer.va_tx[0]) {

		res = -ENODEV;

		goto err_dma_alloc_tx_0;

	}



	cfspi->xfer.va_rx = dma_alloc(&cfspi->xfer.pa_rx);

	cfspi->xfer.va_rx = dma_alloc(cfspi, &cfspi->xfer.pa_rx);



	if (!cfspi->xfer.va_rx) {

		res = -ENODEV;
@@ -665,9 +667,9 @@ static int cfspi_init(struct net_device *dev) 
	return 0;



 err_create_wq:

	dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

	dma_free(cfspi, cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

 err_dma_alloc_rx:

	dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

	dma_free(cfspi, cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

 err_dma_alloc_tx_0:

	return res;

}
@@ -683,8 +685,8 @@ static void cfspi_uninit(struct net_device *dev) 


	cfspi->ndev = NULL;

	/* Free DMA buffers. */

	dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

	dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

	dma_free(cfspi, cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

	dma_free(cfspi, cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

	set_bit(SPI_TERMINATE, &cfspi->state);

	wake_up_interruptible(&cfspi->wait);

	destroy_workqueue(cfspi->wq);

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