linux-kernel - Re: [PATCH 2/2] phy: qcom-qmp: fix reset-controller leak on probe errors

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Date:   Mon, 25 Apr 2022 11:45:29 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Vivek Gautam <vivek.gautam@...eaurora.org>
Subject: Re: [PATCH 2/2] phy: qcom-qmp: fix reset-controller leak on probe
 errors

Hi Johan,

On Fr, 2022-04-22 at 15:09 +0200, Johan Hovold wrote:
> Make sure to release the lane reset controller in case of a late probe
> error (e.g. probe deferral).

Right. grepping for "of_reset_control_get", there seem to be are a few
other drivers that might share the same issue...

> Note that due to the reset controller being defined in devicetree in
> (questionable) "lane" child nodes, devm_reset_control_get_exclusive()
> cannot be used (and we shouldn't add devres helpers for the legacy reset
> controller API).

Do you mean of_reset_control_get()? Maybe you could switch to
of_reset_control_get_exclusive() while at it?

That one might warrant a devres helper if other drivers were to adopt
the same pattern.

The patch itself looks fine to me,

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>

regards
Philipp