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authorMarcelo Cerri <marcelo.cerri@canonical.com>2017-02-27 09:38:25 -0300
committerHerbert Xu <herbert@gondor.apana.org.au>2017-03-09 18:34:39 +0800
commite6c2e65c70a6f606ea764f301e4024c85e0cd7a8 (patch)
tree8d9587716148dcd7c3894ef8a7f7f3ff811e634b /crypto/ctr.c
parentb13b1e0c6b171b4f6ad94dd99020708719983494 (diff)
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crypto: cbc - Propagate NEED_FALLBACK bit
When requesting a fallback algorithm, we should propagate the NEED_FALLBACK bit when search for the underlying algorithm. This will prevents drivers from allocating unnecessary fallbacks that are never called. For instance, currently the vmx-crypto driver will use the following chain of calls when calling the fallback implementation: p8_aes_cbc -> cbc(p8_aes) -> aes-generic However p8_aes will always delegate its calls to aes-generic. With this patch, p8_aes_cbc will be able to use cbc(aes-generic) directly as its fallback. The same applies to aes_s390. Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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