Re: Async Crypto API

[Dmitry Kasatkin <dmitry.kasatkin@nokia.com>]

Hi,

1 more question.

>From what context "crypto_completion_t" can be called?
irq/tasklet/process
or something else?


Thanks,
Dmitry



ext Herbert Xu wrote:
> Dmitry Kasatkin <dmitry.kasatkin@nokia.com> wrote:
>   
>> Hello,
>>
>> I have one question about async api.
>>
>> I work on AHASH driver and wonder about one thing.
>>
>> while calculating hash, client might call many times
>>
>> ahash_request_set_crypt(req, &sg, sha1, len);
>> crypto_ahash_update(req);
>> ..
>> ..
>> ahash_request_set_crypt(req, &sg, sha1, len);
>> crypto_ahash_finup(req);
>>
>> right?
>>
>> But because it is async and driver does not wait_for_completion,
>> previous request may not be completed before client will call next update.
>>
>> But what should be the behavior of the driver?
>>     
>
> If any async operation returns EINPROGRESS, the client must not
> proceed until that operation has completed.
>
> Cheers,
>