Patchwork [1/1] swiotlb: fix comment on swiotlb_bounce()

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Submitter Dongli Zhang
Date Dec. 6, 2018, 4:17 a.m.
Message ID <1544069876-21185-1-git-send-email-dongli.zhang@oracle.com>
Download mbox | patch
Permalink /patch/673769/
State New
Headers show

Comments

Dongli Zhang - Dec. 6, 2018, 4:17 a.m.
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>
---
 kernel/dma/swiotlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 045930e..0a5ec94 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -389,7 +389,7 @@  static 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)