On Tue, Jun 16, 2015 at 11:58:59AM +0200, Boris Brezillon wrote: > > + ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents, > + DMA_TO_DEVICE); > + if (ret != creq->src_nents) > + return -ENOMEM; Hmm it doesn't quite work like that. It returns zero on error, otherwise it returns the number (n) of mapped entries which may be less than what you gave it due to merging. You're then supposed to use only the first n entries which should contain everything. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
