linux-kernel - Re: [PATCH v14 1/5] lightnvm: Support for Open-Channel SSDs

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Date:	Wed, 11 Nov 2015 23:46:13 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Matias Bjørling <m@...rling.me>
Cc:	Jens Axboe <axboe@...com>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-nvme@...ts.infradead.org,
	Christoph Hellwig <hch@...radead.org>, jg@...htnvm.io,
	Stephen.Bates@...s.com, Keith Busch <keith.busch@...el.com>
Subject: Re: [PATCH v14 1/5] lightnvm: Support for Open-Channel SSDs

On Wed, Oct 28, 2015 at 7:54 PM, Matias Bjørling <m@...rling.me> wrote:
> +struct nvm_dev_ops {

[...]

> +       uint8_t                 max_phys_sect;
> +};

> --- /dev/null
> +++ b/drivers/lightnvm/core.c

> +int nvm_register(struct request_queue *q, char *disk_name,
> +                                                       struct nvm_dev_ops *ops)
> +{

[...]

> +       } else if (dev->ops->max_phys_sect > 256) {

drivers/nfc/nfcmrvl/i2c.c:52: warning: comparison is always false due
to limited range of data type

Indeed, max_phys_sect is "uint8_t", so its maximum value is 255.

> +               pr_info("nvm: max sectors supported is 256.\n");

Hence this message is not correct. What's the intended maximum value?
255 or 256?

> +               return -EINVAL;
> +       }

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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