linux-kernel - Re: [PATCH RFC 1/3] crypto: Prevent to register duplicate cra_driver

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Message-ID: <40918176.d7CsG1ORth@tauon.chronox.de>
Date:   Thu, 21 Dec 2017 07:27:31 +0100
From:   Stephan Mueller <smueller@...onox.de>
To:     Corentin Labbe <clabbe@...libre.com>
Cc:     davem@...emloft.net, herbert@...dor.apana.org.au,
        nhorman@...driver.com, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 1/3] crypto: Prevent to register duplicate cra_driver_name

Am Mittwoch, 20. Dezember 2017, 21:09:25 CET schrieb Corentin Labbe:

Hi Corentin,

> Each crypto algorithm "cra_name" can have multiple implementation called
> "cra_driver_name".
> If two different implementation have the same cra_driver_name, nothing
> can easily differentiate them.
> Furthermore the mechanism for getting a crypto algorithm with its
> implementation name (crypto_alg_match() in crypto/crypto_user.c) will
> get only the first one found.
> 
> So this patch prevent the registration of two implementation with the
> same cra_driver_name.

Have you seen that happen? The driver_name should be an unambiguous name that 
is unique throughout all crypto implementations.

If you have seen a duplication, then this duplication should be fixed.

Ciao
Stephan