path: root/crypto/api.c
diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2009-02-18 16:56:59 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2009-02-18 16:56:59 +0800
commit3f683d6175748ef9daf4698d9ef5a488dd037063 (patch)
tree1cea62b5937871b34c533416e05bedbee4a4914c /crypto/api.c
parentff753308d2f70f210ba468492cd9a01274d9d7ce (diff)
crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention
This is based on a report and patch by Geert Uytterhoeven. The functions crypto_alloc_tfm and create_create_tfm return a pointer that needs to be adjusted by the caller when successful and otherwise an error value. This means that the caller has to check for the error and only perform the adjustment if the pointer returned is valid. Since all callers want to make the adjustment and we know how to adjust it ourselves, it's much easier to just return adjusted pointer directly. The only caveat is that we have to return a void * instead of struct crypto_tfm *. However, this isn't that bad because both of these functions are for internal use only (by types code like shash.c, not even algorithms code). This patch also moves crypto_alloc_tfm into crypto/internal.h (crypto_create_tfm is already there) to reflect this. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/api.c')
1 files changed, 7 insertions, 8 deletions
diff --git a/crypto/api.c b/crypto/api.c
index 56b6e0e66311..22385cac90bb 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -453,8 +453,8 @@ err:
-struct crypto_tfm *crypto_create_tfm(struct crypto_alg *alg,
- const struct crypto_type *frontend)
+void *crypto_create_tfm(struct crypto_alg *alg,
+ const struct crypto_type *frontend)
char *mem;
struct crypto_tfm *tfm = NULL;
@@ -488,9 +488,9 @@ out_free_tfm:
- tfm = ERR_PTR(err);
+ mem = ERR_PTR(err);
- return tfm;
+ return mem;
@@ -514,12 +514,11 @@ EXPORT_SYMBOL_GPL(crypto_create_tfm);
* In case of error the return value is an error pointer.
-struct crypto_tfm *crypto_alloc_tfm(const char *alg_name,
- const struct crypto_type *frontend,
- u32 type, u32 mask)
+void *crypto_alloc_tfm(const char *alg_name,
+ const struct crypto_type *frontend, u32 type, u32 mask)
struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
- struct crypto_tfm *tfm;
+ void *tfm;
int err;
type &= frontend->maskclear;

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