linux-kernel - RE: [PATCH net-next v2 3/3] net: stmmac: Introducing support for Page Pool

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Message-ID: <BYAPR12MB3269D8AA0646A74178ED4024D3FA0@BYAPR12MB3269.namprd12.prod.outlook.com>
Date:   Thu, 4 Jul 2019 15:40:45 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "Ilias Apalodimas" <ilias.apalodimas@...aro.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: RE: [PATCH net-next v2 3/3] net: stmmac: Introducing support for Page
 Pool

From: Jesper Dangaard Brouer <brouer@...hat.com>

> This code is okay, but I would likely write it as:
> 
>   if (rx_q->page_pool) {
> 	page_pool_request_shutdown(rx_q->page_pool));
> 	page_pool_free(rx_q->page_pool);
>   }
> 
> Because (as you noticed) page_pool_free() have some API misuse checks,
> that will get triggered, and thus provide a warning of you forget to
> update this when driver evolves.

Yeah, makes sense. I will update and resend. Thanks for the review!