linux-kernel - Re: [PATCH -next] coresight: trbe: Fix return value check in arm_trbe_register_coresight

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Message-ID: <51e3225a-1abb-1c52-93cc-c6935f0c4b52@arm.com>
Date:   Fri, 9 Apr 2021 14:42:39 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Wei Yongjun <weiyongjun1@...wei.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next] coresight: trbe: Fix return value check in
 arm_trbe_register_coresight_cpu()



On 4/9/21 6:52 AM, Wei Yongjun wrote:
> In case of error, the function devm_kasprintf() returns NULL
> pointer not ERR_PTR(). The IS_ERR() test in the return value
> check should be replaced with NULL test.

Right.

> 
> Fixes: 3fbf7f011f24 ("coresight: sink: Add TRBE driver")

Again, dont think this warrants "Fixes:" tag as there were no
functional problem to be fixed here.

> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> ---
>  drivers/hwtracing/coresight/coresight-trbe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
> index 5ce239875c98..176868496879 100644
> --- a/drivers/hwtracing/coresight/coresight-trbe.c
> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
> @@ -871,7 +871,7 @@ static void arm_trbe_register_coresight_cpu(struct trbe_drvdata *drvdata, int cp
>  
>  	dev = &cpudata->drvdata->pdev->dev;
>  	desc.name = devm_kasprintf(dev, GFP_KERNEL, "trbe%d", cpu);
> -	if (IS_ERR(desc.name))
> +	if (!desc.name)
>  		goto cpu_clear;
>  
>  	desc.type = CORESIGHT_DEV_TYPE_SINK;
>

LGTM.