linux-kernel - RE: [RFC PATCH] usb: reduce kernel log spam on driver registration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 26 Aug 2022 09:31:57 +0530
From:   "Alim Akhtar" <alim.akhtar@...sung.com>
To:     "'Russell King \(Oracle\)'" <linux@...linux.org.uk>
Cc:     "'Ard Biesheuvel'" <ardb@...nel.org>,
        <linux-kernel@...r.kernel.org>,
        "'Alexandre Belloni'" <alexandre.belloni@...tlin.com>,
        <linux-samsung-soc@...r.kernel.org>,
        "'Tomer Maimon'" <tmaimon77@...il.com>,
        <linux-omap@...r.kernel.org>,
        "'Avi Fishman'" <avifishman70@...il.com>,
        "'Greg Kroah-Hartman'" <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>,
        "'Tali Perry'" <tali.perry1@...il.com>,
        "'Nancy Yuen'" <yuenn@...gle.com>,
        "'Krzysztof Kozlowski'" <krzysztof.kozlowski@...aro.org>,
        "'Alan Stern'" <stern@...land.harvard.edu>,
        "'Patrice Chotard'" <patrice.chotard@...s.st.com>,
        "'Patrick Venture'" <venture@...gle.com>,
        "'Vladimir Zapolskiy'" <vz@...ia.com>,
        "'Claudiu Beznea'" <claudiu.beznea@...rochip.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        "'Benjamin Fair'" <benjaminfair@...gle.com>
Subject: RE: [RFC PATCH] usb: reduce kernel log spam on driver registration



>-----Original Message-----
>From: Russell King (Oracle) [mailto:linux@...linux.org.uk]
>Sent: Thursday, August 25, 2022 11:40 PM
>To: Alim Akhtar <alim.akhtar@...sung.com>
>Cc: 'Ard Biesheuvel' <ardb@...nel.org>; linux-kernel@...r.kernel.org;
>'Alexandre Belloni' <alexandre.belloni@...tlin.com>; linux-samsung-
>soc@...r.kernel.org; 'Tomer Maimon' <tmaimon77@...il.com>; linux-
>omap@...r.kernel.org; 'Avi Fishman' <avifishman70@...il.com>; 'Greg
>Kroah-Hartman' <gregkh@...uxfoundation.org>; linux-usb@...r.kernel.org;
>'Tali Perry' <tali.perry1@...il.com>; 'Nancy Yuen' <yuenn@...gle.com>;
>'Krzysztof Kozlowski' <krzysztof.kozlowski@...aro.org>; 'Alan Stern'
><stern@...land.harvard.edu>; 'Patrice Chotard'
><patrice.chotard@...s.st.com>; 'Patrick Venture' <venture@...gle.com>;
>'Vladimir Zapolskiy' <vz@...ia.com>; 'Claudiu Beznea'
><claudiu.beznea@...rochip.com>; linux-arm-kernel@...ts.infradead.org;
>'Benjamin Fair' <benjaminfair@...gle.com>
>Subject: Re: [RFC PATCH] usb: reduce kernel log spam on driver registration
>
>On Thu, Aug 25, 2022 at 10:53:44PM +0530, Alim Akhtar wrote:
>> >Drivers are typically supposed to be quiet unless they are actually
>> >probed,
>> but
>> >for some reason, USB host controllers seem to be exempt from this
>> >rule, and happily broadcast their existence into the kernel log at
>> >boot even if the hardware in question is nowhere to be found.
>> >
>> >Let's fix that, and remove these pr_info() calls.
>> >
>> How about just change pr_info() to pr_debug() instead?
>
>Do the messages serve a useful purpose that the initcall_debug kernel
>parameter (that doesn't require #define DEBUG to be set while compiling and
>thus can be used with any kernel) doesn't provide?
>
Ah, right,  initcall_debug will do the job.
So removing pr_info() from init call looks good.
Thanks.

Hi Ard
Feel free to add 

Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>


>--
>RMK's Patch system: https://protect2.fireeye.com/v1/url?k=3b37dc19-
>5abcc93c-3b365756-74fe485cbff6-6a25f0b5c8476bae&q=1&e=752dac9b-cfef-
>4919-8665-
>8a220aac5d96&u=https%3A%2F%2Fwww.armlinux.org.uk%2Fdeveloper%2Fp
>atches%2F
>FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!