[PATCHv3 03/11] crypto: omap-sham: implement context export/import APIs

[Herbert Xu]

On Thu, Sep 01, 2016 at 09:12:59AM +0300, Tero Kristo wrote:
> 
> Well, but the driver doesn't flush its buffers automatically, it
> caches data until it has sufficient amount available. So, assuming
> you want to do this:
> 
> sham_init
>   sham_update 256 bytes
>   sham_update 256 bytes
>   wait until two above updates are complete
>   sham_export
> 
> ... the execution hangs at the wait phase as the driver is still

Well that's a bug in the driver.  While it's not illegal to wait
for more data, it's usually unnecessary.  Because we instead try
to get our users to generate as big a request as possible, e.g.,
one packet for IPsec.

If you really have to do the hold thing, then you must install a
timer like sha1-mb does on x86 to do the flush.

In any case, the completion function must not be called until
you're actually complete.

Cheers,
-- 
Email: Herbert Xu <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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