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

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:	Tue, 3 Jan 2012 14:30:25 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jack Stone <jwjstone@...tmail.fm>,
	Matthew Garrett <mjg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	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.

Am Dienstag, 3. Januar 2012, 14:20:53 schrieb Alan Cox:
> > That said, I guess there are more complicated / difficult pieces of
> > hardware that might not do that. Is that the case here? Can we detect
> > that the firmware needs reloading and have the primary driver "yield" to
> > the firmware driver?
> 
> That doesn't really make any sense in the way USB works.
> 
> However if you've got a system to load and pin firmware on suspend and
> flush it post resume then you don't actually need special 'firmware'
> drivers just a slightly fancier lib/firmware that refcounts and handles
> load on suspend/delayed flush.

How so? You still need to get the firmware to the device before
you unfreeze user space to get a benefit from this. Having it in
RAM is only half the deal.

	Regards
		Oliver
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/