linux-kernel - Re: [Bug #13846] Possible regression in rt61pci driver

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Date:	Mon, 3 Aug 2009 22:17:19 +0200
From:	Ivo van Doorn <ivdoorn@...il.com>
To:	chris2553@...glemail.com
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	linux-wireless@...r.kernel.org
Subject: Re: [Bug #13846] Possible regression in rt61pci driver

Hi,

> On Sunday 02 August 2009, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.30.  Please verify if it still should be listed and let me know
> > (either way).
> >
> 
> The folks on the wireless project have concluded that the problem I reported is down to a hardware 
> problem when power saving is switched on on for my Belkin cardbus wireless adapter, so now I simply 
> turn power-saving off when wlan0 comes up. I did, however, ask whether anyone was going to fix the 
> fact that once power-saving turns the LEDs off, they never come back on again, but I haven't had an 
> answer. Is that a regression? I guess the answer is no, because power saving in the rt61pci driver 
> is feature that is new to 2.6.31. Should it be fixed? I think the answer is yes, but being unable 
> to do it myself, I probably don't have a vote :-)

Can't recall this issue was ever reported, but that might just be me having overlooked some emails
or have completely forgotten all about it. But here is a test patch to see if this helps in the issue,
it is not really correct for upstream, but if it works I can see if there is a better solution.

Thanks,

Ivo
---
diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index 3845316..6fe70b1 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -196,6 +196,12 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 	 */
 	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
 
+	if (ieee80211_flags & IEEE80211_CONF_CHANGE_PS) {
+		rt2x00led_led_activity(rt2x00dev, !(conf->flags & IEEE80211_CONF_PS));
+		rt2x00leds_led_assoc(rt2x00dev, !(conf->flags & IEEE80211_CONF_PS));
+		rt2x00leds_led_radio(rt2x00dev, !(conf->flags & IEEE80211_CONF_PS));
+	}
+
 	/*
 	 * Some configuration changes affect the link quality
 	 * which means we need to reset the link tuner.
--
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