linux-kernel - Re: [PATCH] coresight: tpdm: remove redundant check for drvdata

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Message-ID: <4f5ad681-b531-48a1-8fae-a0c3b5a51a29@arm.com>
Date: Fri, 7 Nov 2025 13:29:41 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Jie Gan <jie.gan@....qualcomm.com>, Mike Leach <mike.leach@...aro.org>,
 James Clark <james.clark@...aro.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Tingwei Zhang <tingwei.zhang@....qualcomm.com>,
 Tao Zhang <tao.zhang@....qualcomm.com>,
 Mao Jinlong <jinlong.mao@....qualcomm.com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coresight: tpdm: remove redundant check for drvdata

On 07/11/2025 06:16, Jie Gan wrote:
> Remove the redundant check for drvdata data because the drvdata here already
> has been guarranted to be non-NULL.
> 
> Fixes: 350ba15ae187 ("coresight-tpdm: Add nodes for dsb msr support")
> Fixes: 8e8804145a46 ("coresight-tpdm: Add msr register support for CMB")

This doesn't need to be backported as such, as it is a cleanup. I will 
drop the Fixes tag and merge this.

Suzuki

> Signed-off-by: Jie Gan <jie.gan@....qualcomm.com>
> ---
>   drivers/hwtracing/coresight/coresight-tpdm.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
> index 0e3896c12f07..06e0a905a67d 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> @@ -1402,11 +1402,11 @@ static int tpdm_probe(struct device *dev, struct resource *res)
>   		if (ret)
>   			return ret;
>   
> -		if (drvdata && tpdm_has_dsb_dataset(drvdata))
> +		if (tpdm_has_dsb_dataset(drvdata))
>   			of_property_read_u32(drvdata->dev->of_node,
>   					     "qcom,dsb-msrs-num", &drvdata->dsb_msr_num);
>   
> -		if (drvdata && tpdm_has_cmb_dataset(drvdata))
> +		if (tpdm_has_cmb_dataset(drvdata))
>   			of_property_read_u32(drvdata->dev->of_node,
>   					     "qcom,cmb-msrs-num", &drvdata->cmb_msr_num);
>   	} else {
> 
> ---
> base-commit: df5d79720b152e7ff058f11ed7e88d5b5c8d2a0c
> change-id: 20251107-fix_tpdm_redundant_check-a5a7bad4b7c8
> prerequisite-change-id: 20251028-add_static_tpdm_support-1f62477857e2:v4
> prerequisite-patch-id: eda8dd6884b831cb10affc22477aece39c78b408
> prerequisite-patch-id: 7beb8b17d54ff21bc57eab10b56e6ffcfa4d1963
> prerequisite-patch-id: f6f1e78dba3f1d3b1191ab827adab5a3b7b2326a
> 
> Best regards,