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Re: lockdep splat related to wifi regulatory in 3.3.6+

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hi Ben,

On Sat, May 19, 2012 at 1:45 AM, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
> This appears to be this bug:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=734519
>
> Test case was to create 40 (virtual) stations against an AP that can only
> handle
> 30, so the remaining 10 constantly try to re-associate, get DHCP if
> they manage, etc....
>
>
> cfg80211: Calling CRDA for country: US
>
> ======================================================
> [ INFO: possible circular locking dependency detected ]
> 3.3.6+ #1 Tainted: G        WC O
> -------------------------------------------------------
> kworker/1:2/62 is trying to acquire lock:
>  (cfg80211_mutex){+.+.+.}, at: [<ffffffffa00f7ced>]
> restore_regulatory_settings+0x2c/0x4af [cfg80211]
>
> but task is already holding lock:
>  ((reg_timeout).work){+.+...}, at: [<ffffffff8104c5c1>]
> process_one_work+0x1c2/0x35a
>
> which lock already depends on the new lock.
>
Try this:
http://www.spinics.net/lists/linux-wireless/msg90322.html

Eliad.
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