linux-kernel - ] [PATCH net-next] net: ethernet: mtk_eth_soc: add missing check for rhashtable

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Date: Thu, 16 May 2024 09:56:25 +0000
From: Hariprasad Kelam <hkelam@...vell.com>
To: Chen Ni <nichen@...as.ac.cn>, "nbd@....name" <nbd@....name>,
        "sean.wang@...iatek.com" <sean.wang@...iatek.com>,
        "Mark-MC.Lee@...iatek.com"
	<Mark-MC.Lee@...iatek.com>,
        "lorenzo@...nel.org" <lorenzo@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com"
	<edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>,
        "angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>
Subject: ] [PATCH net-next] net: ethernet: mtk_eth_soc: add missing check for
 rhashtable_init



> Add check for the return value of rhashtable_init() and return the error if it
> fails in order to catch the error.
> 
> Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac
> address based offload entries")
> Signed-off-by: Chen Ni <nichen@...as.ac.cn>
> ---
>  drivers/net/ethernet/mediatek/mtk_ppe.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.c
> b/drivers/net/ethernet/mediatek/mtk_ppe.c
> index 0acee405a749..f7e5e6e52cdf 100644
> --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
> +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
> @@ -884,12 +884,15 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth,
> void __iomem *base, int index)
>  	struct mtk_ppe *ppe;
>  	u32 foe_flow_size;
>  	void *foe;
> +	int ret;
> 
>  	ppe = devm_kzalloc(dev, sizeof(*ppe), GFP_KERNEL);
>  	if (!ppe)
>  		return NULL;
> 
> -	rhashtable_init(&ppe->l2_flows, &mtk_flow_l2_ht_params);
> +	ret = rhashtable_init(&ppe->l2_flows, &mtk_flow_l2_ht_params);
> +	if (ret)
> +		return NULL;

Instead of returning NULL, return actual error ERR_PTR(ret) and use IS_ERR_OR_NULL API to validate the error

Thanks,
Hariprasad k
> 
>  	/* need to allocate a separate device, since it PPE DMA access is
>  	 * not coherent.
> --
> 2.25.1
>