From: Dongli Zhang <dongli.zhang@oracle.com>
To: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org
Cc: konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com,
robin.murphy@arm.com, joe.jin@oracle.com,
dongli.zhang@oracle.com
Subject: [PATCH v3 1/3] swiotlb: fix comment on swiotlb_bounce()
Date: Fri, 18 Jan 2019 15:10:26 +0800 [thread overview]
Message-ID: <1547795428-10595-1-git-send-email-dongli.zhang@oracle.com> (raw)
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(-)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 1fb6fd6..1d8b377 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -385,7 +385,7 @@ void __init swiotlb_exit(void)
}
/*
- * 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)
--
2.7.4
next reply other threads:[~2019-01-18 7:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-18 7:10 Dongli Zhang [this message]
2019-01-18 7:10 ` [PATCH v3 2/3] swiotlb: add debugfs to track swiotlb buffer usage Dongli Zhang
2019-01-18 7:10 ` [PATCH v3 3/3] swiotlb: checking whether swiotlb buffer is full with io_tlb_used Dongli Zhang
2019-02-12 18:47 ` [PATCH v3 1/3] swiotlb: fix comment on swiotlb_bounce() Konrad Rzeszutek Wilk
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