netdev - Re: latest net-next: iwlwifi: reproducible SOFTIRQ-unsafe lock order detected

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Message-ID: <20140527190922.GA8378@tuxdriver.com>
Date:	Tue, 27 May 2014 15:09:22 -0400
From:	"John W. Linville" <linville@...driver.com>
To:	Oliver Hartkopp <socketcan@...tkopp.net>
Cc:	"Berg, Johannes" <johannes.berg@...el.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Linux Netdev List <netdev@...r.kernel.org>,
	"Grumbach, Emmanuel" <emmanuel.grumbach@...el.com>,
	"'johannes@...solutions.net'" <johannes@...solutions.net>
Subject: Re: latest net-next: iwlwifi: reproducible SOFTIRQ-unsafe lock order
 detected

I have that commit in wireless-next, included in the pull request
sent today.

John

On Tue, May 27, 2014 at 08:38:12PM +0200, Oliver Hartkopp wrote:
> Yep! That fixed it.
> 
> Tested-by: Oliver Hartkopp <socketcan@...tkopp.net>
> 
> Btw. this issue is in net-next.
> 
> Regards,
> Oliver
> 
> 
> On 27.05.2014 20:03, Berg, Johannes wrote:
> >> Bug added in commit ea68f46070c7bae608c619ae048f0ad995db74c3
> >> ("iwlwifi: pcie: clarify TX queue need_update handling")
> >>
> >> Please try :
> >>
> >> diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c
> >> b/drivers/net/wireless/iwlwifi/pcie/tx.c
> >> index dde6031f4257..309a13caddcd 100644
> >> --- a/drivers/net/wireless/iwlwifi/pcie/tx.c
> >> +++ b/drivers/net/wireless/iwlwifi/pcie/tx.c
> >> @@ -338,12 +338,12 @@ void iwl_pcie_txq_check_wrptrs(struct iwl_trans
> >> *trans)
> >>  	for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
> >>  		struct iwl_txq *txq = &trans_pcie->txq[i];
> >>
> >> -		spin_lock(&txq->lock);
> >> +		spin_lock_bh(&txq->lock);
> > 
> > Yeah, we have the same commit in the tree:
> > 
> > commit d090f878b0084344812dc7bb086e98cd24572e58
> > Author: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
> > Date:   Tue May 13 08:10:51 2014 +0300
> > 
> >     iwlwifi: pcie: disable BHs in iwl_pcie_txq_check_wrptrs
> > 
> > I'm not sure why it hasn't hit net.git, I no longer maintain iwlwifi.git.
> > 
> > johannes
> > 
> --
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-- 
John W. Linville		Someday the world will need a hero, and you
linville@...driver.com			might be all we have.  Be ready.
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