[PATCH 2/3] MIPS: dma-default: use virtual addresses when flushing caches

[Denis Orlov <denorl2009@gmail.com>]

Cache flushing functions expect virtual addresses, so make sure those
are properly converted from the physical ones in dma_sync_single_for_*.
QEMU doesn't care as it ignores cache instructions, but without such
change this code would result in TLB exceptions on real hardware.

Signed-off-by: Denis Orlov <denorl2009@gmail.com>
---
 arch/mips/lib/dma-default.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/mips/lib/dma-default.c b/arch/mips/lib/dma-default.c
index 48176e5d28..f6c750b8ac 100644
--- a/arch/mips/lib/dma-default.c
+++ b/arch/mips/lib/dma-default.c
@@ -30,11 +30,15 @@ static inline void __dma_sync_mips(unsigned long addr, size_t size,
 void dma_sync_single_for_cpu(dma_addr_t address, size_t size,
 			     enum dma_data_direction dir)
 {
-	__dma_sync_mips(address, size, dir);
+	unsigned long virt = (unsigned long)phys_to_virt(address);
+
+	__dma_sync_mips(virt, size, dir);
 }
 
 void dma_sync_single_for_device(dma_addr_t address, size_t size,
 				enum dma_data_direction dir)
 {
-	__dma_sync_mips(address, size, dir);
+	unsigned long virt = (unsigned long)phys_to_virt(address);
+
+	__dma_sync_mips(virt, size, dir);
 }
-- 
2.30.2