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

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Message-ID: <4F0220F5.30309@fastmail.fm>
Date:	Mon, 02 Jan 2012 21:26:13 +0000
From:	Jack Stone <jwjstone@...tmail.fm>
To:	Matthew Garrett <mjg@...hat.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	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 02/01/12 21:19, Matthew Garrett wrote:
> 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.
> 

Can we tell by the USB ids that this is a device that might need
firmware and load it into memory anyway - it would use more memory but
would always work as we would have the firmware.

Thanks,

Jack
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