linux-kernel - Re: [PATCH] ASoC: qcom: soundwire: Enable soundwire bus clock for version 1.6

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Date:   Tue, 5 Oct 2021 10:03:56 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, rohitkr@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, judyhsiao@...omium.org
Cc:     Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH] ASoC: qcom: soundwire: Enable soundwire bus clock for
 version 1.6



>>> +        ctrl->swrm_hctl_reg = devm_ioremap(&pdev->dev,
>>> swrm_hctl_reg, 0x4);
>> if (!ctrl->swrm_hctl_reg)
>>      return -ENODEV;
>>
>> ?
> I think here error check is not required, as this change is required
> only for soundwire version 1.6 and above.

My comment had nothing to do with versions, it's just that ioremap can
fail and in general it's wise to test for errors...