crypto: Add bulk algorithm registration interface

Hardware crypto engines frequently need to register a selection of
different algorithms with the core. Simplify their code slightly,
especially the error handling, by providing functions to register a
number of algorithms in a single call.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 9d4a9fe..056571b 100644 (file)
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -405,6 +405,41 @@ int crypto_unregister_alg(struct crypto_alg *alg)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_alg);
 
+int crypto_register_algs(struct crypto_alg *algs, int count)
+{
+       int i, ret;
+
+       for (i = 0; i < count; i++) {
+               ret = crypto_register_alg(&algs[i]);
+               if (ret)
+                       goto err;
+       }
+
+       return 0;
+
+err:
+       for (--i; i >= 0; --i)
+               crypto_unregister_alg(&algs[i]);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_register_algs);
+
+int crypto_unregister_algs(struct crypto_alg *algs, int count)
+{
+       int i, ret;
+
+       for (i = 0; i < count; i++) {
+               ret = crypto_unregister_alg(&algs[i]);
+               if (ret)
+                       pr_err("Failed to unregister %s %s: %d\n",
+                              algs[i].cra_driver_name, algs[i].cra_name, ret);
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_algs);
+
 int crypto_register_template(struct crypto_template *tmpl)
 {
        struct crypto_template *q;

diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index a8fa654..48ce547 100644 (file)
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -314,6 +314,8 @@ struct crypto_alg {
  */
 int crypto_register_alg(struct crypto_alg *alg);
 int crypto_unregister_alg(struct crypto_alg *alg);
+int crypto_register_algs(struct crypto_alg *algs, int count);
+int crypto_unregister_algs(struct crypto_alg *algs, int count);
 
 /*
  * Algorithm query interface.