Messages in this thread Patch in this message | | | From | Andrey Smirnov <> | Subject | [PATCH] dma-mapping.h: Preserve unmap info for CONFIG_DMA_API_DEBUG | Date | Tue, 20 Sep 2016 08:58:45 -0700 |
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When CONFIG_DMA_API_DEBUG is enabled we need to preserve unmapping address even if "unmap" is a no-op for our architecutre because we need debug_dma_unmap_page() to correctly cleanup all of the debug bookkeeping. Failing to do so results in a false positive warnings about previously mapped areas never being unmapped.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> --- 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 71c1b21..41c9875 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -678,7 +678,7 @@ static inline int dma_mmap_wc(struct device *dev, #define dma_mmap_writecombine dma_mmap_wc #endif -#ifdef CONFIG_NEED_DMA_MAP_STATE +#if defined(CONFIG_NEED_DMA_MAP_STATE) || defined(CONFIG_DMA_API_DEBUG) #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME #define DEFINE_DMA_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME #define dma_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME) -- 2.5.5
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