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-rw-r--r--arch/arm/common/dmabounce.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index 2e635b8..272702a 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -281,10 +281,14 @@ map_single(struct device *dev, void *ptr, size_t size,
ptr = buf->safe;
dma_addr = buf->safe_dma_addr;
+ } else {
+ /*
+ * We don't need to sync the DMA buffer since
+ * it was allocated via the coherent allocators.
+ */
+ consistent_sync(ptr, size, dir);
}
- consistent_sync(ptr, size, dir);
-
return dma_addr;
}
@@ -397,7 +401,10 @@ sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
default:
BUG();
}
- consistent_sync(buf->safe, size, dir);
+ /*
+ * No need to sync the safe buffer - it was allocated
+ * via the coherent allocators.
+ */
} else {
consistent_sync(dma_to_virt(dev, dma_addr), size, dir);
}