From: Christoph Hellwig <hch@lst.de>
Date: Sun, 27 Aug 2017 07:59:32 +0000 (+0200)
Subject: frv: make dma_cache_sync a no-op
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=9d254b8e409e90db21384974f4725bff369c333f;p=openwrt%2Fstaging%2Fblogic.git

frv: make dma_cache_sync a no-op

frv does not implement DMA_ATTR_NON_CONSISTENT allocations, so it doesn't
make any sense to do any work in dma_cache_sync given that it must be a
no-op when dma_alloc_attrs returns coherent memory.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
---

diff --git a/arch/frv/include/asm/dma-mapping.h b/arch/frv/include/asm/dma-mapping.h
index 354900917585..da0e5c9744c4 100644
--- a/arch/frv/include/asm/dma-mapping.h
+++ b/arch/frv/include/asm/dma-mapping.h
@@ -18,7 +18,6 @@ static inline
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		    enum dma_data_direction direction)
 {
-	flush_write_buffers();
 }
 
 #endif  /* _ASM_DMA_MAPPING_H */