linux-kernel - Re: [PATCH v4 04/35] mtd: rawnand: denali: convert to nand

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Message-ID: <20180725115116.1fb38fe3@bbrezillon>
Date:   Wed, 25 Jul 2018 11:51:16 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Mans Rullgard <mans@...sr.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Stefan Agner <stefan@...er.ch>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Josh Wu <rainyfeeling@...look.com>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        Marek Vasut <marek.vasut@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Broadcom Kernel Feedback List 
        <bcm-kernel-feedback-list@...adcom.com>,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        Wenyou Yang <wenyou.yang@...rochip.com>,
        Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Harvey Hunt <harveyhuntnexus@...il.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Han Xu <han.xu@....com>, Xiaolei Li <xiaolei.li@...iatek.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Richard Weinberger <richard@....at>,
        Brian Norris <computersforpeace@...il.com>,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH v4 04/35] mtd: rawnand: denali: convert to nand_scan()

On Wed, 25 Jul 2018 18:42:44 +0900
Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:

> 
> You need to remove kfree(denali->buf)
> from denali_remove(), right?

Absolutely.

> 
> void denali_remove(struct denali_nand_info *denali)
> {
>         struct mtd_info *mtd = nand_to_mtd(&denali->nand);
> 
>         nand_release(mtd);
>         kfree(denali->buf);       <---- REMOVE !!
>         denali_disable_irq(denali);
> }
> 
> 
> Otherwise, denali_remove() will free denali->buf twice
> because kfree(denali->buf) is called from denali_detach_chip().