From: Christian Eggers <ceggers@arri.de>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Arnd Bergmann <arnd@arndb.de>, Martin Kaiser <martin@kaiser.cx>,
Sascha Hauer <s.hauer@pengutronix.de>,
Matt Mackall <mpm@selenic.com>,
linux-kernel@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-crypto@vger.kernel.org
Subject: Re: [PATCH] hwrng: imx-rngc - setup default RNG quality
Date: Tue, 28 Jul 2020 10:47:29 +0200 [thread overview]
Message-ID: <2473540.1Sv8tvBx5K@n95hx1g2> (raw)
In-Reply-To: <20200728074817.hlevn7ex2hckdbvi@pengutronix.de>
Hi Marco,
On Tuesday, 28 July 2020, 09:48:17 CEST, Marco Felsch wrote:
> Hi Christian,
>
> On 20-07-27 14:45, Christian Eggers wrote:
> > When hw_random device's quality is non-zero, it will automatically fill
> > the kernel's entropy pool at boot. For this purpose, one conservative
> > quality value is being picked up as the default value.
>
> IMHO your value is not conservative enough and the commit message should
> explain why we should use 900. Unfortunately I had not enough time to
> send my patch addressing this. However please check my commit message
> why 900 is not good:
ok, you caught me. I found the value of 900 in several other drivers and
simply took it. Even parts of my commit message were simply copied...
As I have no real idea about determining the right quality, I will leave this
task for you :-)
Thanks
Christian
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next prev parent reply other threads:[~2020-07-28 8:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 10:57 [PATCH] Support for RNGB on i.MX6 ULL Christian Eggers
2020-07-27 10:57 ` [PATCH 1/3] ARM: dts: imx6ull: Add rngb node Christian Eggers
2020-07-27 11:36 ` Fabio Estevam
2020-07-27 12:45 ` [PATCH] hwrng: imx-rngc - setup default RNG quality Christian Eggers
2020-07-28 7:48 ` Marco Felsch
2020-07-28 8:47 ` Christian Eggers [this message]
2020-07-27 10:57 ` [PATCH 2/3] hwrng: imx-rngc - make clock optional Christian Eggers
2020-07-27 10:57 ` [PATCH 3/3] hwrng: imx-rngc - setup default RNG quality Christian Eggers
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