linux-kernel - Re: [PATCH] firmware class: export nowait to userspace

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Date:	Fri, 12 Mar 2010 05:21:54 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Tomas Winkler <tomasw@...il.com>, Greg KH <greg@...ah.com>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] firmware class: export nowait to userspace

On Thu, Mar 11, 2010 at 23:56, Johannes Berg <johannes@...solutions.net> wrote:
> When we use request_firmware_nowait(), userspace may
> not want to answer negatively right away when for
> example it is answering from an initrd only, but
> with request_firmware() it has to in order to not
> delay the kernel boot until the request times out.
>
> This allows userspace to differentiate between the
> two in order to be able to reply negatively to async
> requests only when all filesystems have been mounted
> and have been checked for the requested firmware file.

The firmware_class already always exports a TIMEOUT= value, right? If
this is the case, it should be set to 0, I guess.

Sounds fine to have a flag like this, while "NOWAIT" is, I guess, a
pretty bad name from the event perspective. This name might make sense
for the called kernel function, but not so much for a firmware loader
instruction.

Thanks,
Kay
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