linux-kernel - Re: [PATCH v2] Coresight: Narrow down the matching range of tpdm

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Message-ID: <c002b839-310e-4c68-acc3-c3433c16e1fe@arm.com>
Date: Wed, 13 Nov 2024 13:28:45 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Songwei Chai <quic_songchai@...cinc.com>,
 Mike Leach <mike.leach@...aro.org>, James Clark <james.clark@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH v2] Coresight: Narrow down the matching range of tpdm

On 09/10/2024 10:17, Songwei Chai wrote:
> The format of tpdm's peripheral id is 1f0exx. To avoid potential
> conflicts in the future, update the .id_table's id to 0x001f0e00.
> This update will narrow down the matching range and prevent incorrect
> matches. For example, another component's peripheral id might be
> f0e00, which would incorrectly match the old id.
> 
> Fixes: b3c71626a9333b0b29f9921a39ce ("Coresight: Add coresight TPDM source driver")
> Signed-off-by: Songwei Chai <quic_songchai@...cinc.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 b7d99e91ab84..3230d76aed90 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> @@ -1308,8 +1308,8 @@ static void tpdm_remove(struct amba_device *adev)
>    */
>   static struct amba_id tpdm_ids[] = {
>   	{
> -		.id = 0x000f0e00,
> -		.mask = 0x000fff00,
> +		.id	= 0x001f0e00,
> +		.mask	= 0x00ffff00,
>   	},
>   	{ 0, 0, NULL },
>   };
> 


Looks good to me, will queue this for v6.14. Apologies for missing the 
v6.13 cycle

Suzuki