linux-kernel - Re: [PATCH] net: ethernet/nvidia: fix possible condition with no effect

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Date:   Sun, 26 Jun 2022 13:08:37 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Praghadeesh T K S <praghadeeshthevendria@...il.com>
Cc:     Rain River <rain.1986.08.12@...il.com>,
        Zhu Yanjun <zyjzyj2000@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, skhan@...uxfoundation.org,
        praghadeeshtks@...omail.in,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] net: ethernet/nvidia: fix possible condition with no
 effect

On Sun, Jun 26, 2022 at 10:35:39AM +0000, Praghadeesh T K S wrote:
> Fix Coccinelle bug, removed condition with no effect.

This is not a coccinelle bug. If it was, you would be patching
coccinelle, not the kernel.

> Signed-off-by: Praghadeesh T K S <praghadeeshthevendria@...il.com>
> ---
>  drivers/net/ethernet/nvidia/forcedeth.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
> index 5116bad..8e49cfa 100644
> --- a/drivers/net/ethernet/nvidia/forcedeth.c
> +++ b/drivers/net/ethernet/nvidia/forcedeth.c
> @@ -3471,9 +3471,6 @@ static int nv_update_linkspeed(struct net_device *dev)
>  	} else if (adv_lpa & LPA_10FULL) {
>  		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
>  		newdup = 1;
> -	} else if (adv_lpa & LPA_10HALF) {
> -		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
> -		newdup = 0;
>  	} else {
>  		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
>  		newdup = 0;

Please google this, see the past discussion about why this code is
there.

	Andrew