linux-kernel - Re: [PATCH v8 3/3] mtd: rawnand: Add support for secure regions in NAND memory

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Date:   Thu, 1 Apr 2021 17:50:52 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>, richard@....at,
        vigneshr@...com, robh+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Daniele.Palmas@...it.com,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH v8 3/3] mtd: rawnand: Add support for secure regions in
 NAND memory

On Thu, 1 Apr 2021 15:48:12 +0530
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> wrote:

>  static int nand_isbad_bbm(struct nand_chip *chip, loff_t ofs)
>  {
> +       struct mtd_info *mtd = nand_to_mtd(chip);
> +       int last_page = ((mtd->erasesize - mtd->writesize) >>
> +                        chip->page_shift) & chip->pagemask;
>         int ret;
>  
>         if (chip->options & NAND_NO_BBM_QUIRK)
>                 return 0;
>  
>         /* Check if the region is secured */
> -       ret = nand_check_secure_region(chip, ofs, 0);
> +       ret = nand_check_secure_region(chip, ofs, last_page);

or just:

	ret = nand_check_secure_region(chip, ofs, mtd->erasesize);


>         if (ret)
>                 return ret;
> 
> > 		*/
> >