From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boris Brezillon <boris.brezillon@bootlin.com>
Subject: Re: [PATCH v4 04/35] mtd: rawnand: denali: convert to nand_scan()
Date: Wed, 25 Jul 2018 11:51:16 +0200
Message-ID: <20180725115116.1fb38fe3@bbrezillon>
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To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Mans Rullgard <mans@mansr.com>, Maxime Ripard <maxime.ripard@bootlin.com>, Stefan Agner <stefan@agner.ch>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linux-mtd <linux-mtd@lists.infradead.org>, Kamal Dasu <kdasu.kdev@gmail.com>, Josh Wu <rainyfeeling@outlook.com>, Marc Gonzalez <marc.w.gonzalez@free.fr>, Marek Vasut <marek.vasut@gmail.com>, Chen-Yu Tsai <wens@csie.org>, Broadcom Kernel Feedback List <bcm-kernel-feedback-list@broadcom.com>, Sylvain Lemieux <slemieux.tyco@gmail.com>, Wenyou Yang <wenyou.yang@microchip.com>, Tudor Ambarus <Tudor.Ambarus@microchip.com>, Vladimir Zapolskiy <vz@mleia.com>, Harvey Hunt <harveyhuntnexus@gmail.>
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On Wed, 25 Jul 2018 18:42:44 +0900
Masahiro Yamada <yamada.masahiro@socionext.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().