linux-kernel - udev 182: response timeout for request_firmware in module

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Date:	Tue, 21 Aug 2012 13:34:57 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johannes Berg <johannes@...solutions.net>,
	Larry Finger <Larry.Finger@...inger.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: udev 182: response timeout for request_firmware in module_probe path

Hi Kay,

I found that udev 182 doesn't response for the request_firmware in
module_probe path until 30sec later after the 'ADD' event of firmware
device, but no such problem in udev175, sounds like a regression of udev?

I find there was a related discussion in [1], so CC guys who discussed before.

Just grep under kernel root dir, there are about 360 request_firmware callers,
and looks most of them are called in .probe path.

[1], https://lkml.org/lkml/2012/2/19/57

Thanks,
-- 
Ming Lei
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