[PATCH RFT 1/2] ARM: mmu: take DMA offset into account for coherent memory

[Ahmad Fatoum <a.fatoum@barebox.org>]

Now that dma_alloc_coherent and dma_alloc_writecombine take an optional
device parameter, let's take the dma_offset of the device into account
if a device has been supplied.

This will allow supporting systems, where the CPU and other DMA masters,
see the SDRAM at different addresses (i.e. has a dma-ranges in the DT).

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
Result of a discussion with Anis. Needs to be tested.
---
 arch/arm/cpu/mmu-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/cpu/mmu-common.c b/arch/arm/cpu/mmu-common.c
index dd4c8f7de7d4..30a9dfbcb9c0 100644
--- a/arch/arm/cpu/mmu-common.c
+++ b/arch/arm/cpu/mmu-common.c
@@ -47,7 +47,7 @@ void *dma_alloc_map(struct device *dev,
 	size = PAGE_ALIGN(size);
 	ret = xmemalign(PAGE_SIZE, size);
 	if (dma_handle)
-		*dma_handle = (dma_addr_t)ret;
+		*dma_handle = cpu_to_dma(ret);
 
 	memset(ret, 0, size);
 	dma_flush_range(ret, size);
-- 
2.47.3