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

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Date:	Tue, 27 May 2014 20:38:12 +0200
From:	Oliver Hartkopp <socketcan@...tkopp.net>
To:	"Berg, Johannes" <johannes.berg@...el.com>,
	Eric Dumazet <eric.dumazet@...il.com>
CC:	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

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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