diff options
author | Olof Johansson <olof@lixom.net> | 2013-01-30 10:04:23 -0800 |
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committer | Olof Johansson <olof@lixom.net> | 2013-01-30 10:04:56 -0800 |
commit | 3e93093ecd0c144e86a86cc1f165221b6cd3e7fb (patch) | |
tree | 0d6dffb90985bd90fd0ca43076a629f12e277096 /arch/arm/mm/dma-mapping.c | |
parent | 43243322139194c2fea606095f82498e07536c27 (diff) | |
parent | da660b4a3b15caea9c198c4f26d1cf7023df92fc (diff) |
Merge tag 'vexpress/drivers-for-3.9' of git://git.linaro.org/people/pawelmoll/linux into next/drivers
From Pawel Moll:
Versatile Express related driver updates for 3.9:
* Move sp810 header to a more generic location,
mainly to share it with arm64
* tag 'vexpress/drivers-for-3.9' of git://git.linaro.org/people/pawelmoll/linux:
arm: Move sp810.h to include/linux/amba/
+ Linux 3.8-rc5
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
-rw-r--r-- | arch/arm/mm/dma-mapping.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 6b2fb87c8698..076c26d43864 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -774,25 +774,27 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, void (*op)(const void *, size_t, int)) { + unsigned long pfn; + size_t left = size; + + pfn = page_to_pfn(page) + offset / PAGE_SIZE; + offset %= PAGE_SIZE; + /* * A single sg entry may refer to multiple physically contiguous * pages. But we still need to process highmem pages individually. * If highmem is not configured then the bulk of this loop gets * optimized out. */ - size_t left = size; do { size_t len = left; void *vaddr; + page = pfn_to_page(pfn); + if (PageHighMem(page)) { - if (len + offset > PAGE_SIZE) { - if (offset >= PAGE_SIZE) { - page += offset / PAGE_SIZE; - offset %= PAGE_SIZE; - } + if (len + offset > PAGE_SIZE) len = PAGE_SIZE - offset; - } vaddr = kmap_high_get(page); if (vaddr) { vaddr += offset; @@ -809,7 +811,7 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset, op(vaddr, len, dir); } offset = 0; - page++; + pfn++; left -= len; } while (left); } |