linux-kernel - [PATCH] arm/dma-mapping: use for_each

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Date:   Fri, 24 Mar 2017 22:12:23 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Russell King <linux@...linux.org.uk>,
        Joerg Roedel <jroedel@...e.de>,
        Robin Murphy <Robin.Murphy@....com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Geliang Tang <geliangtang@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm/dma-mapping: use for_each_sg

Use for_each_sg() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 arch/arm/mm/dma-mapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 63eabb0..e551351 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1720,7 +1720,7 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
 	if (iova == DMA_ERROR_CODE)
 		return -ENOMEM;
 
-	for (count = 0, s = sg; count < (size >> PAGE_SHIFT); s = sg_next(s)) {
+	for_each_sg(sg, s, size >> PAGE_SHIFT, count) {
 		phys_addr_t phys = page_to_phys(sg_page(s));
 		unsigned int len = PAGE_ALIGN(s->offset + s->length);
 
-- 
2.9.3