linux-kernel - Re: Kernel WARNING: at net/core/dev.c:1330 __netif

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Message-ID: <48862A76.8030307@trash.net>
Date:	Tue, 22 Jul 2008 20:44:06 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Larry Finger <Larry.Finger@...inger.net>
CC:	David Miller <davem@...emloft.net>, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: Kernel WARNING: at net/core/dev.c:1330 __netif_schedule+0x2c/0x98()

Larry Finger wrote:
> Patrick McHardy wrote:
>> Larry Finger wrote:
>>>
>>> =============================================
>>> [ INFO: possible recursive locking detected ]
>>> 2.6.26-Linus-git-05752-g93ded9b #49
>>
>>                    ^^^^^^^^^^^^^^ dirty?
>>
>> This kernel is not using the patches we sent.
>
> No, but they didn't make any difference. I tried with all 3 applied, 
> then backed them out one by one. That was the state when I posted before.

Well, this is a completely different warning.

>
> Here are the dumps with all 3 patches applied:
>
> =============================================
> [ INFO: possible recursive locking detected ]
> 2.6.26-Linus-05752-g93ded9b-dirty #53
> ---------------------------------------------
> b43/1997 is trying to acquire lock:
>  (_xmit_IEEE80211#2){-...}, at: [<ffffffffa028f322>] 
> ieee80211_scan_completed+0x130/0x2e1 [mac80211]
>
> but task is already holding lock:
>  (_xmit_IEEE80211#2){-...}, at: [<ffffffffa028f322>] 
> ieee80211_scan_completed+0x130/0x2e1 [mac80211] 

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