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Message-ID: <479c16ce-da90-4571-bd08-b592d63f06cf@linaro.org>
Date:   Thu, 23 Nov 2023 11:58:19 +0100
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Subject: Re: [RFC PATCH 2/2] soundwire: fix initializing sysfs for same
 devices on different buses
Content-Language: en-US
To:     Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        alsa-devel@alsa-project.org, srinivas.kandagatla@linaro.org
Cc:     tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org,
        gregkh@linuxfoundation.org,
        Bard liao <yung-chuan.liao@linux.intel.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        Vijendar Mukunda <Vijendar.Mukunda@amd.com>
References: <20231017160933.12624-1-pierre-louis.bossart@linux.intel.com>
 <20231017160933.12624-3-pierre-louis.bossart@linux.intel.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <20231017160933.12624-3-pierre-louis.bossart@linux.intel.com>
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Precedence: bulk

On 17/10/2023 18:09, Pierre-Louis Bossart wrote:
> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> 
> If same devices with same device IDs are present on different soundwire
> buses, the probe fails due to conflicting device names and sysfs
> entries:
> 
>   sysfs: cannot create duplicate filename '/bus/soundwire/devices/sdw:0:0217:0204:00:0'
> 
> The link ID is 0 for both devices, so they should be differentiated by
> the controller ID. Add the controller ID so, the device names and sysfs entries look
> like:
> 
>   sdw:1:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6ab0000.soundwire-controller/sdw-master-1-0/sdw:1:0:0217:0204:00:0
>   sdw:3:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6b10000.soundwire-controller/sdw-master-3-0/sdw:3:0:0217:0204:00:0
> 
> [PLB changes: use bus->controller_id instead of bus->id]
> 
> Fixes: 7c3cd189b86d ("soundwire: Add Master registration")
> Cc: <stable@vger.kernel.org>
> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
> Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
> Co-developed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

The order of SoB is not correct. Author's goes before co-developed.


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof