lkml.org 
[lkml]   [2017]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] dma-mapping: take dma_pfn_offset into account in dma_max_pfn
Date
This makes sure the generic version can be used with architectures /
devices that have a DMA offset in the direct mapping.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/dma-mapping.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index e8f8e8fb244d..86beb9861618 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -692,7 +692,7 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
#ifndef dma_max_pfn
static inline unsigned long dma_max_pfn(struct device *dev)
{
- return *dev->dma_mask >> PAGE_SHIFT;
+ return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset;
}
#endif

--
2.14.2
\
 
 \ /
  Last update: 2017-12-04 17:37    [W:0.027 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site