From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Sat, 24 Mar 2007 12:58:12 +0000 (+0300)
Subject: [WATCHDOG] Semi-typical watchdog bug re early misc_register()
X-Git-Tag: v2.6.22-rc1~105^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb8f7ba077b5c665432082ab205bcd2cb01f6a3c;p=pandora-kernel.git

[WATCHDOG] Semi-typical watchdog bug re early misc_register()

It seems that some watchdog drivers are doing following mistake:

	rv = misc_register();
	if (rv < 0)
		return rv;
	rv = request_region();
	if (rv < 0) {
		misc_deregister();
		return rv;
	}

But, right after misc_register() returns, misc device can be opened and
ioctls interacting with hardware issued, and driver can do outb() to
port it doesn't own yet, because request_region() is still pending.

Here is my patch, compile-tested only.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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