lkml.org 
[lkml]   [2018]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] swiotlb: Update the comment of swiotlb
Date
swiotlb use physical address of bounce buffer when do map and unmap,
therefore, related comment should be updated.

Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
---
lib/swiotlb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index fece575..e3d9445 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -593,9 +593,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
}

/*
- * Allocates bounce buffer and returns its kernel virtual address.
+ * Allocates bounce buffer and returns its physical address.
*/
-
static phys_addr_t
map_single(struct device *hwdev, phys_addr_t phys, size_t size,
enum dma_data_direction dir, unsigned long attrs)
@@ -614,7 +613,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
}

/*
- * dma_addr is the kernel virtual address of the bounce buffer to unmap.
+ * tlb_addr is the physical address of the bounce buffer to unmap.
*/
void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
size_t size, enum dma_data_direction dir,
--
1.7.12.4
\
 
 \ /
  Last update: 2018-05-07 13:17    [W:1.793 / U:0.852 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site