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crypto: caam - save caam memory to support crypto engine retry mechanism.

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When caam queue is full (-ENOSPC), caam frees descriptor memory.
crypto-engine checks if retry support is true and h/w queue
is full(-ENOSPC), then requeue the crypto request.
During processing the requested descriptor again, caam gives below error.
(caam_jr 30902000.jr: 40000006: DECO: desc idx 0: Invalid KEY Command).

This patch adds a check to return when caam input ring is full
and retry support is true. so descriptor memory is not freed
and requeued request can be processed again.

Fixes: 2d653936eb ("crypto: caam - enable crypto-engine retry mechanism")
Signed-off-by: Gaurav Jain <gaurav.jain@nxp.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gaurav Jain
2021-11-22 17:02:34 +05:30
committed by Herbert Xu
parent 330507fbc9
commit 087e1d715b
3 changed files with 12 additions and 0 deletions
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3
drivers/crypto/caam/caamhash.c
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@@ -765,6 +765,9 @@ static int ahash_do_one_req(struct crypto_engine *engine, void *areq)
ret = caam_jr_enqueue(jrdev, desc, state->ahash_op_done, req);
if (ret == -ENOSPC && engine->retry_support)
return ret;
if (ret != -EINPROGRESS) {
ahash_unmap(jrdev, state->edesc, req, 0);
kfree(state->edesc);