linux-kernel - Re: 2.6.23-rc6 : crash with RTL8187 USB

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Message-ID: <6b8cef970709150921s48488096wa8089d8d9f5d28bf@mail.gmail.com>
Date:	Sat, 15 Sep 2007 12:21:39 -0400
From:	"Rob Hussey" <robjhussey@...il.com>
To:	"ポール・ロラン Paul Rolland" 
	<rol@...be.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc6 : crash with RTL8187 USB

On 9/15/07, ポール・ロラン Paul Rolland <rol@...be.net> wrote:
> Hello,
>
> Each time I add the support for this piece of hardware, I have a crash during
> the boot process.
> Serial console gives the attached boot message...
>
...
> WARNING: at lib/kref.c:33 kref_get()
> Call Trace:
>  [<ffffffff8121fa41>] kref_get+0x2f/0x36
>  [<ffffffff8121ec3f>] kobject_get+0x12/0x17
>  [<ffffffff8121edad>] kobject_shadow_add+0x7f/0x1a2
>  [<ffffffff812beaa4>] device_add+0xb7/0x631
>  [<ffffffff81040607>] msleep+0x14/0x1e
>  [<ffffffff8149f95f>] wiphy_register+0x29/0x80
>  [<ffffffff814a4a9b>] ieee80211_register_hw+0x11/0x208
>  [<ffffffff812e1a64>] rtl8187_probe+0x544/0x624

I had this problem as well. It has to do with mac80211, cfg80211 and
the rate control algorithm not initializing early enough in the boot
process. These two patches should fix it:

[PATCH] mac80211: fix initialisation when built-in
http://article.gmane.org/gmane.linux.kernel.wireless.general/5710/match=patch+mac80211+initialisation

[PATCH] cfg80211: fix initialisation if built-in
http://article.gmane.org/gmane.linux.network/71326/match=patch+cfg80211+initialisation

Regards,
Rob
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