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[RFC,v2,1/3] crypto: update generic ECB's driver_name to 'ecb_generic'

Message ID 1393313660-5258-2-git-send-email-ard.biesheuvel@linaro.org
State New
Headers show

Commit Message

Ard Biesheuvel Feb. 25, 2014, 7:34 a.m. UTC 
As ECB could potentially be wrapped by other chaining modes to operate on
larger chunks of data in parallel, we would like to distinguish between the
generic ECB and accelerated implementations of ECB, as using the former will
not result in any speedup.

Therefore, update the driver name of generic ECB to 'ecb_generic(%s)'.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 crypto/ecb.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/crypto/ecb.c b/crypto/ecb.c
index 935cfef4aa84..46a6a61fbcb9 100644
--- a/crypto/ecb.c
+++ b/crypto/ecb.c
@@ -134,6 +134,12 @@  static struct crypto_instance *crypto_ecb_alloc(struct rtattr **tb)
 	if (IS_ERR(inst))
 		goto out_put_alg;
 
+	err = -ENAMETOOLONG;
+	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+		     "ecb_generic(%s)", alg->cra_driver_name)
+	    >= CRYPTO_MAX_ALG_NAME)
+		goto out_err;
+
 	inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER;
 	inst->alg.cra_priority = alg->cra_priority;
 	inst->alg.cra_blocksize = alg->cra_blocksize;
@@ -155,6 +161,12 @@  static struct crypto_instance *crypto_ecb_alloc(struct rtattr **tb)
 out_put_alg:
 	crypto_mod_put(alg);
 	return inst;
+
+out_err:
+	crypto_drop_spawn(crypto_instance_ctx(inst));
+	kfree(inst);
+	crypto_mod_put(alg);
+	return ERR_PTR(err);
 }
 
 static void crypto_ecb_free(struct crypto_instance *inst)