Hi Herbert,

On Mon, 15 Jun 2015 18:09:20 +0800
Herbert Xu [off-list ref] wrote:

On Fri, Jun 12, 2015 at 09:15:57AM +0200, Boris Brezillon wrote:

quoted

+	ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
+			 DMA_TO_DEVICE);
+	if (ret < 0)

This function returns zero on error, not negative.  See
Documentation/DMA-API-HOWTO.txt for details.

Yep, I'll fix that.

Thanks for pointing this out.

Best Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com