netdev - Re: [PATCH net-next] net: stmmac: Fix return value check in qcom_ethqos

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Date:   Wed, 23 Jan 2019 14:00:01 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Wei Yongjun <weiyongjun1@...wei.com>, davem@...emloft.net
Cc:     Niklas Cassel <niklas.cassel@...aro.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH net-next] net: stmmac: Fix return value check in
 qcom_ethqos_probe()

On 23-01-19, 06:19, Wei Yongjun wrote:
> In case of error, the function devm_clk_get() returns ERR_PTR() and
> never returns NULL. The NULL test in the return value check should be
> replaced with IS_ERR().

Acked-by: Vinod Koul <vkoul@...nel.org>

This is a networking subsystem patch and you missed Dave :(

> Fixes: a7c30e62d4b8 ("net: stmmac: Add driver for Qualcomm ethqos")
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index 30724bd..7ec8954 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -473,8 +473,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
>  	ethqos->por = of_device_get_match_data(&pdev->dev);
>  
>  	ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii");
> -	if (!ethqos->rgmii_clk) {
> -		ret = -ENOMEM;
> +	if (IS_ERR(ethqos->rgmii_clk)) {
> +		ret = PTR_ERR(ethqos->rgmii_clk);
>  		goto err_mem;
>  	}
> 
> 

-- 
~Vinod