Re: [RFC PATCH] usb: reduce kernel log spam on driver registration

From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Alim Akhtar <alim.akhtar@samsung.com>
Cc: 'Ard Biesheuvel' <ardb@kernel.org>,
	linux-kernel@vger.kernel.org,
	'Alexandre Belloni' <alexandre.belloni@bootlin.com>,
	linux-samsung-soc@vger.kernel.org,
	'Tomer Maimon' <tmaimon77@gmail.com>,
	linux-omap@vger.kernel.org,
	'Avi Fishman' <avifishman70@gmail.com>,
	'Greg Kroah-Hartman' <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, 'Tali Perry' <tali.perry1@gmail.com>,
	'Nancy Yuen' <yuenn@google.com>,
	'Krzysztof Kozlowski' <krzysztof.kozlowski@linaro.org>,
	'Alan Stern' <stern@rowland.harvard.edu>,
	'Patrice Chotard' <patrice.chotard@foss.st.com>,
	'Patrick Venture' <venture@google.com>,
	'Vladimir Zapolskiy' <vz@mleia.com>,
	'Claudiu Beznea' <claudiu.beznea@microchip.com>,
	linux-arm-kernel@lists.infradead.org,
	'Benjamin Fair' <benjaminfair@google.com>
Subject: Re: [RFC PATCH] usb: reduce kernel log spam on driver registration
Date: Thu, 25 Aug 2022 19:10:04 +0100	[thread overview]
Message-ID: <Ywe6/AKzVL/77Fhi@shell.armlinux.org.uk> (raw)
In-Reply-To: <065601d8b8a7$6fee5850$4fcb08f0$@samsung.com>

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? 

-- 
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