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-rw-r--r--include/linux/dma-mapping.h18
1 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ac07ff090919..2e551e2d2d03 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -1,6 +1,7 @@
#ifndef _LINUX_DMA_MAPPING_H
#define _LINUX_DMA_MAPPING_H
+#include <linux/sizes.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/err.h>
@@ -145,7 +146,9 @@ static inline void arch_teardown_dma_ops(struct device *dev) { }
static inline unsigned int dma_get_max_seg_size(struct device *dev)
{
- return dev->dma_parms ? dev->dma_parms->max_segment_size : 65536;
+ if (dev->dma_parms && dev->dma_parms->max_segment_size)
+ return dev->dma_parms->max_segment_size;
+ return SZ_64K;
}
static inline unsigned int dma_set_max_seg_size(struct device *dev,
@@ -154,14 +157,15 @@ static inline unsigned int dma_set_max_seg_size(struct device *dev,
if (dev->dma_parms) {
dev->dma_parms->max_segment_size = size;
return 0;
- } else
- return -EIO;
+ }
+ return -EIO;
}
static inline unsigned long dma_get_seg_boundary(struct device *dev)
{
- return dev->dma_parms ?
- dev->dma_parms->segment_boundary_mask : 0xffffffff;
+ if (dev->dma_parms && dev->dma_parms->segment_boundary_mask)
+ return dev->dma_parms->segment_boundary_mask;
+ return DMA_BIT_MASK(32);
}
static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
@@ -169,8 +173,8 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
if (dev->dma_parms) {
dev->dma_parms->segment_boundary_mask = mask;
return 0;
- } else
- return -EIO;
+ }
+ return -EIO;
}
#ifndef dma_max_pfn