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authorGilad Ben-Yossef <gilad@benyossef.com>2017-10-18 08:00:33 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2017-11-03 22:11:16 +0800
commit6b80ea389a0bceee6a0a801474b78ad0a8cd034d (patch)
tree6f4725c6a0ac6c093a1f6dc4077fb40865cf3882 /crypto/algapi.c
parentc8dd5e456d2483f051bc92f9c67f01144d122a0b (diff)
downloadlwn-6b80ea389a0bceee6a0a801474b78ad0a8cd034d.tar.gz
lwn-6b80ea389a0bceee6a0a801474b78ad0a8cd034d.zip
crypto: change transient busy return code to -ENOSPC
The crypto API was using the -EBUSY return value to indicate both a hard failure to submit a crypto operation into a transformation provider when the latter was busy and the backlog mechanism was not enabled as well as a notification that the operation was queued into the backlog when the backlog mechanism was enabled. Having the same return code indicate two very different conditions depending on a flag is both error prone and requires extra runtime check like the following to discern between the cases: if (err == -EINPROGRESS || (err == -EBUSY && (ahash_request_flags(req) & CRYPTO_TFM_REQ_MAY_BACKLOG))) This patch changes the return code used to indicate a crypto op failed due to the transformation provider being transiently busy to -ENOSPC. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/algapi.c')
-rw-r--r--crypto/algapi.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index aa699ff6c876..60d7366ed343 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -897,9 +897,11 @@ int crypto_enqueue_request(struct crypto_queue *queue,
int err = -EINPROGRESS;
if (unlikely(queue->qlen >= queue->max_qlen)) {
- err = -EBUSY;
- if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
+ err = -ENOSPC;
goto out;
+ }
+ err = -EBUSY;
if (queue->backlog == &queue->list)
queue->backlog = &request->list;
}