linux-kernel - Re: [PATCH] net: dwmac-rk: No need to check the return value of the phy_power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <e178677c-c8aa-462b-8d12-e0b4b8b6c7b7@lunn.ch>
Date: Mon, 26 May 2025 19:05:08 +0200
From: Andrew Lunn <andrew@...n.ch>
To: 李哲 <sensor1010@....com>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, mcoquelin.stm32@...il.com,
	alexandre.torgue@...s.st.com, jonas@...boo.se,
	rmk+kernel@...linux.org.uk, david.wu@...k-chips.com, wens@...e.org,
	jan.petrous@....nxp.com, netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: dwmac-rk: No need to check the return value of the
 phy_power_on()

On Mon, May 26, 2025 at 09:16:21AM -0700, 李哲 wrote:
> since the return value of the phy_power_on() function is always 0,
> checking its return value is redundant.
> 
> Signed-off-by: 李哲 <sensor1010@....com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> index 700858ff6f7c..6e8b10fda24d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -1839,11 +1839,7 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
>  		dev_err(dev, "NO interface defined!\n");
>  	}
>  
> -	ret = phy_power_on(bsp_priv, true);
> -	if (ret) {
> -		gmac_clk_enable(bsp_priv, false);
> -		return ret;
> -	}
> +	phy_power_on(bsp_priv, true);

I suggest you go one step further and turn phy_power_on() into a void
function.

net-next is closed for the next two week due to the merge window.

	Andrew