[PATCH] ath11k: acquire ab->base_lock in unassign when finding the peer by addr

[Niels Dossche]

On 16/03/2022 15:34, Kalle Valo wrote:
> Niels Dossche <dossche.niels at gmail.com> writes:
> 
>> On 3/16/22 07:13, Kalle Valo wrote:
>>> Niels Dossche <dossche.niels at gmail.com> writes:
>>>
>>>> ath11k_peer_find_by_addr states via lockdep that ab->base_lock must be
>>>> held when calling that function in order to protect the list. All
>>>> callers except ath11k_mac_op_unassign_vif_chanctx have that lock
>>>> acquired when calling ath11k_peer_find_by_addr. That lock is also not
>>>> transitively held by a path towards ath11k_mac_op_unassign_vif_chanctx.
>>>> The solution is to acquire the lock when calling
>>>> ath11k_peer_find_by_addr inside ath11k_mac_op_unassign_vif_chanctx.
>>>>
>>>> Fixes: 701e48a43e15 ("ath11k: add packet log support for QCA6390")
>>>> Signed-off-by: Niels Dossche <dossche.niels at gmail.com>
>>>
>>> On what hardware and firmware version did you test this?
>>>
>>
>> Thanks for your reply.
>> I am currently working on a static analyser to detect missing locks.
>> This was a reported case. I manually verified the report by looking
>> at the code, so that I do not send wrong information or patches.
>> After concluding that this seems to be a true positive, I created this patch.
>> However, as I do not in fact have this particular hardware, I was unable to test it.
> 
> Ah, I didn't realise this. If you are using a tool to find errors in the
> code it's always a good idea to document that in the commit log. I'll
> add an edited version of what wrote you above in the commit log, ok?
> 

I will make sure to write that in future commits, sorry for the inconvenience.
Adding an edited version of what I write to the commit log is okay for me, thanks!