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Commit 546c596c authored by Shunyong Yang's avatar Shunyong Yang Committed by Bjorn Helgaas
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PCI: Unify PCI and normal DMA direction definitions 



Current DMA direction definitions in pci-dma-compat.h and dma-direction.h
are mirrored in value.  Unify them to enhance readability and avoid
possible inconsistency.

Signed-off-by: default avatarShunyong Yang <shunyong.yang@hxt-semitech.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Cc: Joey Zheng <yu.zheng@hxt-semitech.com>
parent f7368a55

include/linux/dma-direction.h

+2 −4
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _LINUX_DMA_DIRECTION_H

#define _LINUX_DMA_DIRECTION_H

/*

 * These definitions mirror those in pci.h, so they can be used

 * interchangeably with their PCI_ counterparts.

 */



enum dma_data_direction {

	DMA_BIDIRECTIONAL = 0,

	DMA_TO_DEVICE = 1,

	DMA_FROM_DEVICE = 2,

	DMA_NONE = 3,

};



#endif

include/linux/pci-dma-compat.h

+4 −4
Original line number Diff line number Diff line
@@ -8,10 +8,10 @@ 
#include <linux/dma-mapping.h>



/* This defines the direction arg to the DMA mapping routines. */

#define PCI_DMA_BIDIRECTIONAL	0

#define PCI_DMA_TODEVICE	1

#define PCI_DMA_FROMDEVICE	2

#define PCI_DMA_NONE		3

#define PCI_DMA_BIDIRECTIONAL	DMA_BIDIRECTIONAL

#define PCI_DMA_TODEVICE	DMA_TO_DEVICE

#define PCI_DMA_FROMDEVICE	DMA_FROM_DEVICE

#define PCI_DMA_NONE		DMA_NONE



static inline void *

pci_alloc_consistent(struct pci_dev *hwdev, size_t size,