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dmaengine: imx-dma: cleanup scatterlist layering violations

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

We replace these with calls to sg_chain and sg_assign_page.

Signed-off-by: Logan Gunthorpe <[email protected]>
Signed-off-by: Stephen Bates <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Vinod Koul <[email protected]>
Cc: Per Förlin <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Logan Gunthorpe 2017-05-30 16:39:16 -06:00 • committed by Vinod Koul
commit ce81801372
1 changed files with 2 additions and 5 deletions
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7
drivers/dma/imx-dma.c
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@ -888,7 +888,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
sg_init_table(imxdmac->sg_list, periods);
for (i = 0; i < periods; i++) {
imxdmac->sg_list[i].page_link = 0;
sg_assign_page(&imxdmac->sg_list[i], NULL);
imxdmac->sg_list[i].offset = 0;
imxdmac->sg_list[i].dma_address = dma_addr;
sg_dma_len(&imxdmac->sg_list[i]) = period_len;
@ -896,10 +896,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
}
/* close the loop */
imxdmac->sg_list[periods].offset = 0;
sg_dma_len(&imxdmac->sg_list[periods]) = 0;
imxdmac->sg_list[periods].page_link =
((unsigned long)imxdmac->sg_list | 0x01) & ~0x02;
sg_chain(imxdmac->sg_list, periods + 1, imxdmac->sg_list);
desc->type = IMXDMA_DESC_CYCLIC;
desc->sg = imxdmac->sg_list;