On Wed, 17 Jun 2015 15:18:29 +0800
Herbert Xu [off-list ref] wrote:

On Wed, Jun 17, 2015 at 09:15:03AM +0200, Boris Brezillon wrote:

quoted

Anyway, now I'm doing the following test:

if (creq->src_nents && !ret)
	return -ENOMEM;

Best not call dma_map_sg at all in the !src_nents case as I think
some architectures will WARN or BUG if you give it a zero-length
list.

Okay, I've changed it to test for the !src_nents before calling
dma_map_sg.

Thanks,

Boris


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