linux-kernel - Re: [PATCH 0/8] i2c: fix reference leak when pm_runtime_get

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Date:   Wed, 14 Apr 2021 09:51:27 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Qinglang Miao <miaoqinglang@...wei.com>
Cc:     Michal Simek <michal.simek@...inx.com>,
        Dong Aisheng <aisheng.dong@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Vignesh R <vigneshr@...com>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Tony Lindgren <tony@...mide.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] i2c: fix reference leak when pm_runtime_get_sync
 fails

On Tue, Dec 01, 2020 at 05:29:24PM +0800, Qinglang Miao wrote:
> pm_runtime_get_sync will increment the PM reference count
> even failed. Forgetting to putting operation will result
> in a reference leak here. 
> 
> Replace it with pm_runtime_resume_and_get to keep usage
> counter balanced. 
> 
> BTW, pm_runtime_resume_and_get is introduced in v5.10-rc5 as
> dd8088d5a896 ("PM: runtime: Add  pm_runtime_resume_and_get
> to dealwith usage counter")
> 
> Qinglang Miao (8):
>   i2c: cadence: fix reference leak when pm_runtime_get_sync fails
>   i2c: img-scb: fix reference leak when pm_runtime_get_sync fails
>   i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails
>   i2c: imx: fix reference leak when pm_runtime_get_sync fails
>   i2c: omap: fix reference leak when pm_runtime_get_sync fails
>   i2c: sprd: fix reference leak when pm_runtime_get_sync fails
>   i2c: stm32f7: fix reference leak when pm_runtime_get_sync fails
>   i2c: xiic: fix reference leak when pm_runtime_get_sync fails

I applied this series now to for-next, thanks!


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