netdev - Re: [PATCH] nfc: pn533: Add poll mod list filling check

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Message-ID: <ed68c600-aca8-4773-94e3-92347e79877c@kernel.org>
Date: Thu, 4 Jul 2024 14:07:49 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Aleksandr Mishin <amishin@...rgos.ru>,
 Samuel Ortiz <sameo@...ux.intel.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 lvc-project@...uxtesting.org
Subject: Re: [PATCH] nfc: pn533: Add poll mod list filling check

On 03/07/2024 09:26, Aleksandr Mishin wrote:
> 
> 
> On 03.07.2024 8:02, Krzysztof Kozlowski wrote:
>> On 02/07/2024 11:39, Aleksandr Mishin wrote:
>>> In case of im_protocols value is 1 and tm_protocols value is 0 this
>>
>> Which im protocol has value 1 in the mask?
>>
>> The pn533_poll_create_mod_list() handles all possible masks, so your
>> case is just not possible to happen.
> 
> Exactly. pn533_poll_create_mod_list() handles all possible specified 
> masks. No im protocol has value 1 in the mask. In case of 'im_protocol' 

Which cannot happen.

> parameter has value of 1, no mod will be added. So dev->poll_mod_count 
> will remain 0.

Which cannot happen.

> I assume 'im_protocol' parameter is "external" to this driver, it comes 
> from outside and can contain any value, so driver has to be able to 
> protect itself from incorrect values.

Did you read what I wrote? It cannot happen.

Best regards,
Krzysztof