linux-kernel - Re: loading firmware while usermodehelper disabled.

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Message-ID: <20120102211904.GA15316@srcf.ucam.org>
Date:	Mon, 2 Jan 2012 21:19:04 +0000
From:	Matthew Garrett <mjg@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Jack Stone <jwjstone@...tmail.fm>,
	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oliver@...kum.org>,
	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	Chaoming Li <chaoming_li@...lsil.com.cn>,
	"John W. Linville" <linville@...driver.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	USB list <linux-usb@...r.kernel.org>,
	Linux Wireless List <linux-wireless@...r.kernel.org>
Subject: Re: loading firmware while usermodehelper disabled.

On Mon, Jan 02, 2012 at 12:48:48PM -0800, Linus Torvalds wrote:

> Why are you guys making it any more complicated than that?

Because it's inadequate. You can't guarantee that we ever loaded 
firmware. The same hardware might maintain state over warm reboots but 
not over suspend. We never loaded the firmware loader driver. We never 
called request_firmware(). We have no way of knowing whether the device 
is an older one that needs firmware loading, or a newer one which has it 
in flash.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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