From: Logan Gunthorpe <logang@deltatee.com>
To: linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org
Cc: Logan Gunthorpe <logang@deltatee.com>,
Stephen Bates <sbates@raithlin.com>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vinod.koul@intel.com>,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH] dmaengine: ste_dma40, imx-dma: Cleanup scatterlist layering violations
Date: Wed, 24 May 2017 15:58:14 -0600 [thread overview]
Message-ID: <1495663094-22031-1-git-send-email-logang@deltatee.com> (raw)
Two dma engine drivers 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 <logang@deltatee.com>
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
---
drivers/dma/imx-dma.c | 7 ++-----
drivers/dma/ste_dma40.c | 5 +----
2 files changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index ab0fb80..f681df8 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -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;
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);
--
2.1.4
next reply other threads:[~2017-05-24 21:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-24 21:58 Logan Gunthorpe [this message]
2017-05-29 11:26 ` [PATCH] dmaengine: ste_dma40, imx-dma: Cleanup scatterlist layering violations Linus Walleij
2017-05-30 9:57 ` Vinod Koul
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