Hi,
One interesting issue
Many clients in the kernel set CRYPTO_TFM_REQ_MAY_SLEEP to desc.flags.
It is used by crypto_yeld().
But the flags also available in the driver.
One can assume that it is possible to sleep, but is not, because crypto
walk will
walk->data = crypto_kmap(walk->pg, 0);
------------------
for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len);
nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes))
nbytes = crypto_shash_update(desc, walk.data, nbytes);
------------------
That is quite confusing...
I would expect that driver could sleep while hw is doing calculation.
Seems most of the clients uses sync API (linux/net has only sync).
Any comments? Ideas?
Thanks.
- Dmitry
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