commit 838b56adab18040657ec40322fd01d6ebf312ee7
author Logan Gunthorpe <logang@deltatee.com> Tue May 30 16:39:17 2017 -0600
committer Vinod Koul <vinod.koul@intel.com> Thu Jun 01 22:09:12 2017 +0530
tree f7199170ab7ffe8b2e243eb07dab12c83562b784
parent ce81801372313805aa649ea18d27b2fb5f6c16b5

dmaengine: ste_dma40: Cleanup scatterlist layering violations

This dma engine driver directly accesses page_link assuming knowledge
that should be contained only in scatterlist.h.

We replace this access with a call to sg_chain which is equivalent.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Per Förlin <per.forlin@axis.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/ste_dma40.c

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index a6620b6..c3052fb 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2528,10 +2528,7 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
 		dma_addr += period_len;
 	}
 
-	sg[periods].offset = 0;
-	sg_dma_len(&sg[periods]) = 0;
-	sg[periods].page_link =
-		((unsigned long)sg | 0x01) & ~0x02;
+	sg_chain(sg, periods + 1, sg);
 
 	txd = d40_prep_sg(chan, sg, sg, periods, direction,
 			  DMA_PREP_INTERRUPT);