linux-kernel - Re: [PATCH net v2] net:thunderx:Fix resource leaks in device_for_each_child

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Message-ID: <20230705191028.GP6455@unreal>
Date:   Wed, 5 Jul 2023 22:10:28 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Wang Ming <machel@...o.com>
Cc:     Sunil Goutham <sgoutham@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, opensource.kernel@...o.com
Subject: Re: [PATCH net v2] net:thunderx:Fix resource leaks in
 device_for_each_child_node() loops

On Wed, Jul 05, 2023 at 10:34:56PM +0800, Wang Ming wrote:
> The device_for_each_child_node() loop in
> bgx_init_of_phy() function should have
> wnode_handle_put() before break
> which could avoid resource leaks.
> This patch could fix this bug.

It is very strange typographic. You have ~80 chars per-line, while your
longest line is 40 chars only.

> 
> Signed-off-by: Wang Ming <machel@...o.com>
> ---
>  drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> index a317feb8decb..dad32d36a015 100644
> --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
> @@ -1478,8 +1478,10 @@ static int bgx_init_of_phy(struct bgx *bgx)
>  		 * cannot handle it, so exit the loop.
>  		 */
>  		node = to_of_node(fwn);
> -		if (!node)
> +		if (!node) {
> +			fwnode_handle_put(fwn);
>  			break;
> +		}
>  
>  		of_get_mac_address(node, bgx->lmac[lmac].mac);
>  
> @@ -1503,6 +1505,7 @@ static int bgx_init_of_phy(struct bgx *bgx)
>  		lmac++;
>  		if (lmac == bgx->max_lmac) {
>  			of_node_put(node);
> +			fwnode_handle_put(fwn);
>  			break;
>  		}
>  	}
> -- 
> 2.25.1
> 
>