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From:   Logan Gunthorpe <logang@deltatee.com>
To:     linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org,
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Cc:     Christoph Hellwig <hch@lst.de>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Stephen Bates <sbates@raithlin.com>,
        Martin Oliveira <martin.oliveira@eideticom.com>,
        Logan Gunthorpe <logang@deltatee.com>
Date:   Fri, 23 Jul 2021 11:50:07 -0600
Message-Id: <20210723175008.22410-21-logang@deltatee.com>
In-Reply-To: <20210723175008.22410-1-logang@deltatee.com>
References: <20210723175008.22410-1-logang@deltatee.com>
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Subject: [PATCH v2 20/21] dma-mapping: return error code from dma_dummy_map_sg()
Precedence: bulk

From: Martin Oliveira <martin.oliveira@eideticom.com>

The .map_sg() op now expects an error code instead of zero on failure.

The only errno to return is -EINVAL in the case when DMA is not
supported.

Signed-off-by: Martin Oliveira <martin.oliveira@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
---
 kernel/dma/dummy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/dummy.c b/kernel/dma/dummy.c
index eacd4c5b10bf..b492d59ac77e 100644
--- a/kernel/dma/dummy.c
+++ b/kernel/dma/dummy.c
@@ -22,7 +22,7 @@ static int dma_dummy_map_sg(struct device *dev, struct scatterlist *sgl,
 		int nelems, enum dma_data_direction dir,
 		unsigned long attrs)
 {
-	return 0;
+	return -EINVAL;
 }
 
 static int dma_dummy_supported(struct device *hwdev, u64 mask)
-- 
2.20.1