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Open Source and information security mailing list archives
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Date: Mon, 2 Jan 2012 04:24:54 +0100 From: Marek Vasut <marek.vasut@...il.com> To: Michael Büsch <m@...s.ch> Cc: Alan Cox <alan@...rguk.ukuu.org.uk>, Oliver Neukum <oliver@...kum.org>, Linus Torvalds <torvalds@...ux-foundation.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>, Matthew Garrett <mjg@...hat.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 Sun, 1 Jan 2012 20:39:45 +0000 > > Alan Cox <alan@...rguk.ukuu.org.uk> wrote: > > When you suspend the power gets killed so the device loses its firmware > > and goes back to being a firmware requesting thing on resume. > > > > Worse still - you don't easily know if the device is in fact new and was > > added while suspended, or was always there. > > > > So for those devices you do need to load the firmware into them > > automatically after the resume to work out what they are and get the MAC > > to see if its the same wireless card or not. > > Well, that does not prevent you from caching the firmware once you > got it from userspace and keep it until module unload (or probably device > close), so that it is already available on resume. That's actually wrong. If you cached every single firmware, the kernel would gulp down a lot of space that can't be swapped out! M -- 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/
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