linux-kernel - [PATCH 3/3] nvme: use the DMA_ATTR_NO

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Date:	Mon,  1 Aug 2016 19:59:50 -0300
From:	Mauricio Faria de Oliveira <mauricfo@...ux.vnet.ibm.com>
To:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-nvme@...ts.infradead.org, corbet@....net,
	akpm@...ux-foundation.org, rmk+kernel@....linux.org.uk,
	keith.busch@...el.com, axboe@...com, benh@...nel.crashing.org,
	mpe@...erman.id.au
Cc:	k.kozlowski@...sung.com
Subject: [PATCH 3/3] nvme: use the DMA_ATTR_NO_WARN attribute

Use the DMA_ATTR_NO_WARN attribute for the dma_map_sg() call of the nvme
driver that returns BLK_MQ_RQ_QUEUE_BUSY (not for BLK_MQ_RQ_QUEUE_ERROR).

Signed-off-by: Mauricio Faria de Oliveira <mauricfo@...ux.vnet.ibm.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@...ux.vnet.ibm.com>
---
 drivers/nvme/host/pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index d7c33f9..eeaeae0 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -503,7 +503,8 @@ static int nvme_map_data(struct nvme_dev *dev, struct request *req,
 		goto out;
 
 	ret = BLK_MQ_RQ_QUEUE_BUSY;
-	if (!dma_map_sg(dev->dev, iod->sg, iod->nents, dma_dir))
+	if (!dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir,
+				DMA_ATTR_NO_WARN))
 		goto out;
 
 	if (!nvme_setup_prps(dev, req, size))
-- 
1.8.3.1