Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH 1/2] spi: core: Fix check for dma_map_sg() failures | Date | Thu, 10 Jul 2014 15:29:32 +0200 |
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From: Geert Uytterhoeven <geert+renesas@glider.be>
According to Documentation/DMA-API.txt, dma_map_sg() returns 0 on failure. As spi_map_buf() returns an error code, convert zero into -ENOMEM. Keep the existing check for negative numbers just in case.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- drivers/spi/spi.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 3a3245dd64ed..3aac0e885cd9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -617,6 +617,8 @@ static int spi_map_buf(struct spi_master *master, struct device *dev, } ret = dma_map_sg(dev, sgt->sgl, sgt->nents, dir); + if (!ret) + ret = -ENOMEM; if (ret < 0) { sg_free_table(sgt); return ret; -- 1.9.1
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