linux-kernel - Re: [PATCH 2/7] mtd: rawnand: sunxi: Remove an unnecessary check

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Message-ID: <20230102095911.0243d5b8@xps-13>
Date:   Mon, 2 Jan 2023 09:59:11 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Brian Norris <computersforpeace@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 2/7] mtd: rawnand: sunxi: Remove an unnecessary check

Hi Samuel,

samuel@...lland.org wrote on Thu, 29 Dec 2022 12:15:21 -0600:

> sunxi_nand->nsels cannot be zero, so the second check implies the first.

Actually this check comes from a time where we did check against -1 :)
But, yeah, now it's a duplicate.

> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
> 
>  drivers/mtd/nand/raw/sunxi_nand.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
> index 2ee86f7b0905..8b221f9f10a7 100644
> --- a/drivers/mtd/nand/raw/sunxi_nand.c
> +++ b/drivers/mtd/nand/raw/sunxi_nand.c
> @@ -421,7 +421,7 @@ static void sunxi_nfc_select_chip(struct nand_chip *nand, unsigned int cs)
>  	struct sunxi_nand_chip_sel *sel;
>  	u32 ctl;
>  
> -	if (cs > 0 && cs >= sunxi_nand->nsels)
> +	if (cs >= sunxi_nand->nsels)
>  		return;
>  
>  	ctl = readl(nfc->regs + NFC_REG_CTL) &


Thanks,
Miquèl