linux-kernel - Re: [PATCH v2 1/2] i2c: imx: Fix PM runtime inbalance in probe error path

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Date:   Mon, 15 Jun 2020 08:50:00 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Oleksij Rempel <linux@...pel-privat.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Wolfram Sang <wsa@...nel.org>, linux-i2c@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Marc Kleine-Budde <mkl@...gutronix.de>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] i2c: imx: Fix PM runtime inbalance in probe error
 path

On Sun, Jun 14, 2020 at 12:29:03PM +0200, Krzysztof Kozlowski wrote:
> When pm_runtime_get_sync() fails in probe(), the error path should not
> call pm_runtime_put_noidle().  This would lead to inbalance in
> usage_count.
> 
> Fixes: 588eb93ea49f ("i2c: imx: add runtime pm support to improve the performance")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> 
> ---
> 
> Changes since v1:
> 1. New patch

This patch is not correct because the runtime usage counter is increased
always, also on failures.

It can be dropped.

Best regards,
Krzysztof