netdev - Re: [PATCH 11/16] esp: Use a synchronous crypto algorithm on offloading.

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Message-ID: <20170420090617.GA8325@gondor.apana.org.au>
Date:   Thu, 20 Apr 2017 17:06:17 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Steffen Klassert <steffen.klassert@...unet.com>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 11/16] esp: Use a synchronous crypto algorithm on
 offloading.

On Thu, Apr 20, 2017 at 10:55:10AM +0200, Steffen Klassert wrote:
> We need a fallback algorithm for crypto offloading to a NIC.
> This is because packets can be rerouted to other NICs that
> don't support crypto offloading. The fallback is going to be
> implemented at layer2 where we know the final output device
> but can't handle asynchronous returns fron the crypto layer.

Can you explain why we can't handle async algorithms on the fallback
path?

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt