2016-04-02 15:55:53

by Eric Biggers

Subject: [PATCH] crypto: document correct return value for request allocation

Signed-off-by: Eric Biggers <[email protected]>
---
Documentation/DocBook/crypto-API.tmpl | 6 +++---
include/crypto/aead.h | 3 +--
include/crypto/hash.h | 3 +--
include/crypto/skcipher.h | 3 +--
include/linux/crypto.h | 3 +--
5 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/Documentation/DocBook/crypto-API.tmpl b/Documentation/DocBook/crypto-API.tmpl
index 348619f..d55dc5a 100644
--- a/Documentation/DocBook/crypto-API.tmpl
+++ b/Documentation/DocBook/crypto-API.tmpl
@@ -1936,9 +1936,9 @@ static int test_skcipher(void)
}

req = skcipher_request_alloc(skcipher, GFP_KERNEL);
- if (IS_ERR(req)) {
- pr_info("could not allocate request queue\n");
- ret = PTR_ERR(req);
+ if (!req) {
+ pr_info("could not allocate skcipher request\n");
+ ret = -ENOMEM;
goto out;
}

diff --git a/include/crypto/aead.h b/include/crypto/aead.h
index 957bb87..75174f8 100644
--- a/include/crypto/aead.h
+++ b/include/crypto/aead.h
@@ -405,8 +405,7 @@ static inline void aead_request_set_tfm(struct aead_request *req,
* encrypt and decrypt API calls. During the allocation, the provided aead
* handle is registered in the request data structure.
*
- * Return: allocated request handle in case of success; IS_ERR() is true in case
- * of an error, PTR_ERR() returns the error code.
+ * Return: allocated request handle in case of success, or NULL if out of memory
*/
static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm,
gfp_t gfp)
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 1969f14..2660588 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -547,8 +547,7 @@ static inline void ahash_request_set_tfm(struct ahash_request *req,
* the allocation, the provided ahash handle
* is registered in the request data structure.
*
- * Return: allocated request handle in case of success; IS_ERR() is true in case
- * of an error, PTR_ERR() returns the error code.
+ * Return: allocated request handle in case of success, or NULL if out of memory
*/
static inline struct ahash_request *ahash_request_alloc(
struct crypto_ahash *tfm, gfp_t gfp)
diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
index 905490c..0f987f5 100644
--- a/include/crypto/skcipher.h
+++ b/include/crypto/skcipher.h
@@ -425,8 +425,7 @@ static inline struct skcipher_request *skcipher_request_cast(
* encrypt and decrypt API calls. During the allocation, the provided skcipher
* handle is registered in the request data structure.
*
- * Return: allocated request handle in case of success; IS_ERR() is true in case
- * of an error, PTR_ERR() returns the error code.
+ * Return: allocated request handle in case of success, or NULL if out of memory
*/
static inline struct skcipher_request *skcipher_request_alloc(
struct crypto_skcipher *tfm, gfp_t gfp)
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 99c9489..6e28c89 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -948,8 +948,7 @@ static inline struct ablkcipher_request *ablkcipher_request_cast(
* encrypt and decrypt API calls. During the allocation, the provided ablkcipher
* handle is registered in the request data structure.
*
- * Return: allocated request handle in case of success; IS_ERR() is true in case
- * of an error, PTR_ERR() returns the error code.
+ * Return: allocated request handle in case of success, or NULL if out of memory
*/
static inline struct ablkcipher_request *ablkcipher_request_alloc(
struct crypto_ablkcipher *tfm, gfp_t gfp)
--
2.7.4

2016-04-04 07:27:29

by Corentin Labbe

Subject: Re: [PATCH] crypto: document correct return value for request allocation

On Sat, Apr 02, 2016 at 10:54:56AM -0500, Eric Biggers wrote:
> Signed-off-by: Eric Biggers <[email protected]>
> ---
> Documentation/DocBook/crypto-API.tmpl | 6 +++---
> include/crypto/aead.h | 3 +--
> include/crypto/hash.h | 3 +--
> include/crypto/skcipher.h | 3 +--
> include/linux/crypto.h | 3 +--
> 5 files changed, 7 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/DocBook/crypto-API.tmpl b/Documentation/DocBook/crypto-API.tmpl
> index 348619f..d55dc5a 100644
> --- a/Documentation/DocBook/crypto-API.tmpl
> +++ b/Documentation/DocBook/crypto-API.tmpl
> @@ -1936,9 +1936,9 @@ static int test_skcipher(void)
> }
>
> req = skcipher_request_alloc(skcipher, GFP_KERNEL);
> - if (IS_ERR(req)) {
> - pr_info("could not allocate request queue\n");
> - ret = PTR_ERR(req);
> + if (!req) {
> + pr_info("could not allocate skcipher request\n");
> + ret = -ENOMEM;
> goto out;
> }

Hello

I think pr_err is better than pr_info.

Regards

2016-04-15 14:37:42

by Herbert Xu

Subject: Re: [PATCH] crypto: document correct return value for request allocation

On Sat, Apr 02, 2016 at 10:54:56AM -0500, Eric Biggers wrote:
> Signed-off-by: Eric Biggers <[email protected]>

Applied.
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt