Messages in this thread | | | Date | Wed, 17 Jun 2015 13:05:27 +0800 | From | Herbert Xu <> | Subject | Re: [PATCH v5 05/14] crypto: marvell/CESA: add TDMA support |
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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@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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