linux-kernel - Re: [PATCH v5 3/7] staging: skein: Adds CryptoAPI Support

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Date:	Fri, 24 Oct 2014 10:35:04 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Eric Rost <eric.rost@...abylon.net>
Cc:	gregkh@...uxfoundation.org, jake@....net, antonysaraev@...il.com,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/7] staging: skein: Adds CryptoAPI Support

Eric,

We're almost there... :)

On Fri, Oct 24, 2014 at 06:55:33AM -0500, Eric Rost wrote:
> Adds CryptoAPI support to the Skein Hashing Algorithm driver.
> 
> Signed-off-by: Eric Rost <eric.rost@...abylon.net>
> ---
>  drivers/staging/skein/Makefile        |   3 +-
>  drivers/staging/skein/skein_generic.c | 191 ++++++++++++++++++++++++++++++++++
>  2 files changed, 193 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/staging/skein/skein_generic.c
> 
> diff --git a/drivers/staging/skein/Makefile b/drivers/staging/skein/Makefile
> index ca746a9..d8177cc 100644
> --- a/drivers/staging/skein/Makefile
> +++ b/drivers/staging/skein/Makefile
> @@ -5,4 +5,5 @@ obj-$(CONFIG_CRYPTO_SKEIN) += skein_base.o \
>  			      skein_api.o \
>  			      skein_block.o \
>  			      threefish_block.o \
> -			      threefish_api.o
> +			      threefish_api.o \
> +			      skein_generic.o
> diff --git a/drivers/staging/skein/skein_generic.c b/drivers/staging/skein/skein_generic.c
> new file mode 100644
> index 0000000..39332e8
> --- /dev/null
> +++ b/drivers/staging/skein/skein_generic.c
...
> +static int __init skein_generic_init(void)
> +{
> +	if (crypto_register_shash(&alg256) || crypto_register_shash(&alg512)
> +		|| crypto_register_shash(&alg1024)) {
> +		crypto_unregister_shash(&alg256);
> +		crypto_unregister_shash(&alg512);
> +		crypto_unregister_shash(&alg1024);
> +		return -1;
> +	}
> +	return 0;
> +}

This really needs to be something like:

	if (crypto_register_shash(&alg256))
		goto bail;
	if (crypto_register_shash(&alg512))
		goto unreg256;
	if (crypto_register_shash(&alg1024))
		goto unreg512;

	return 0;

unreg512:
	crypto_unregister_shash(&alg512);
unreg256:
	crypto_unregister_shash(&alg256);
bail:
	return -1;

thx,

Jason.
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