From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Machek <pavel@ucw.cz>
Subject: Re: [patch] suspend/resume debugging: device filter
Date: Fri, 26 Jan 2007 09:36:43 +0000
Message-ID: <20070126093643.GA4627@ucw.cz>
References: <20070125110501.GA25151@elte.hu> <20070126015536.GA14917@suse.de>
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To: Greg KH <gregkh@suse.de>
Cc: Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>, Ingo Molnar <mingo@elte.hu>, linux-pm@lists.osdl.org, linux-kernel@vger.kernel.org
List-Id: linux-pm@vger.kernel.org

Hi!

> > it might be better to do this centrally in sysfs, via a per-device =

> > attribute, to individually enable suspend and resume on a per device =

> > basis, but my sysfs-fu is not strong enough for that now ;-)
> =

> Here's a (compile tested only) patch that does this on a per-device
> basis, which is smaller, and should work just as well as your patch.
> =

> It creates a new file in the power/ directory for every device called
> "can_suspend".  Write a '0' to it to prevent that device from being
> suspended.

Maybe we could just introduce debug_flags?

> +static ssize_t can_suspend_store(struct device *dev,
> +				 struct device_attribute *attr,
> +				 const char *buf, size_t n)
> +{
> +	if (!n)
> +		return -EINVAL;
> +
> +	switch (buf[0]) {
> +	case 'y':
> +	case 'Y':
> +	case '1':
> +		dev->no_suspend =3D 0;
> +		break;
> +	case 'n':
> +	case 'N':
> +	case '0':
> +		dev->no_suspend =3D 1;
> +		break;

default: return -EINVAL ?

							Pavel

-- =

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