swiotlb: fix comment on swiotlb_bounce()

Fix the comment as swiotlb_bounce() is used to copy from original dma
location to swiotlb buffer during swiotlb_tbl_map_single(), while to
copy from swiotlb buffer to original dma location during
swiotlb_tbl_unmap_single().

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Orabug: 29582587
(cherry picked from commit 6442ca2abf882d9d838fb844d852ba6acd1db7f4)

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 3c365ab6cf5f47711cf45ab65a593a6738713491..6210202148a56356220025eb16313e42a95b634c 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -383,7 +383,7 @@ int is_swiotlb_buffer(phys_addr_t paddr)
 }
 
 /*
- * Bounce: copy the swiotlb buffer back to the original dma location
+ * Bounce: copy the swiotlb buffer from or back to the original dma location
  */
 static void swiotlb_bounce(phys_addr_t orig_addr, phys_addr_t tlb_addr,
                           size_t size, enum dma_data_direction dir)