linux-kernel - RE: [PATCH] [staging] brcm80211: fix radio disabled on attempt to bring up interface

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Date:	Tue, 12 Oct 2010 11:34:30 -0700
From:	"Brett Rudley" <brudley@...adcom.com>
To:	"jcm@...masters.org" <jcm@...masters.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
cc:	"Henry Ptasinski" <henryp@...adcom.com>,
	"Nohee Ko" <noheek@...adcom.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] [staging] brcm80211: fix radio disabled on attempt
 to bring up interface

Signed-off-by: Brett Rudley <brudley@...adcom.com>
---

> -----Original Message-----
> From: jcm@...masters.org [mailto:jcm@...masters.org]
> Sent: Tuesday, October 12, 2010 1:30 AM
> To: linux-wireless@...r.kernel.org
> Cc: Brett Rudley; Henry Ptasinski; Nohee Ko; Jon Masters; LKML
> Subject: [PATCH] [staging] brcm80211: fix radio disabled on attempt to
> bring up interface
> 
> The brcm80211 driver does not correctly handle the case that the wireless
> radio hardware is physically disabled during interface initialization. An
> attempt is made to check whether the radio is disabled, and in the case
> that it is, a background worker is setup to monitor for the radio coming
> online, but the interface queues are incorrectly brought up anyway. The
> value BCME_RADIOOFF should be returned in wlc_up in such error case.
> 
> Signed-off-by: Jon Masters <jcm@...masters.org>
> 
> diff -urNp brcm80211_orig/sys/wlc_mac80211.c brcm80211/sys/wlc_mac80211.c
> --- brcm80211_orig/sys/wlc_mac80211.c	2010-10-12 04:18:07.940125220 -
> 0400
> +++ brcm80211/sys/wlc_mac80211.c	2010-10-12 04:19:19.814961117 -0400
> @@ -2783,7 +2783,7 @@ int BCMINITFN(wlc_up) (wlc_info_t *wlc)
> 
>  	if (wlc->pub->radio_disabled) {
>  		wlc_radio_monitor_start(wlc);
> -		return 0;
> +		return BCME_RADIOOFF;
>  	}
> 
>  	/* wlc_bmac_up_prep has done wlc_corereset(). so clk is on, set it
> */


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