[PATCH 1/2] spi: core: Fix check for dma_map_sg() failures

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

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@xxxxxxxxx>
---
 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

--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Linux ARM (vger)]     [Linux ARM MSM]     [Linux Omap]     [Linux Arm]     [Linux Tegra]     [Fedora ARM]     [Linux for Samsung SOC]     [eCos]     [Linux PCI]     [Linux Fastboot]     [Gcc Help]     [Git]     [DCCP]     [IETF Announce]     [Security]     [Linux MIPS]     [Yosemite Campsites]

  Powered by Linux