Commit 89e4b66a authored Jul 10, 2014 by Geert Uytterhoeven Committed by Mark Brown Jul 11, 2014

spi: core: Fix check for dma_map_sg() failures



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>
Signed-off-by: Mark Brown <broonie@linaro.org>

parent 7171511e

drivers/spi/spi.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -619,6 +619,8 @@ 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;