Subject: Re: [Linux-stm32] [PATCH] dmaengine: stm32-dmamux: Fix PM disable
 depth imbalance in stm32_dmamux_probe
To:     Miaoqian Lin <linmq006@gmail.com>
CC:     Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@st.com>,
        <linux-kernel@vger.kernel.org>, Vinod Koul <vkoul@kernel.org>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        <dmaengine@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>
References: <20220108085336.11992-1-linmq006@gmail.com>
From:   Amelie DELAUNAY <amelie.delaunay@foss.st.com>
Message-ID: <37a66156-a616-058d-b3c0-6d2ca22a12ed@foss.st.com>
Date:   Mon, 10 Jan 2022 17:11:00 +0100
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On 1/8/22 9:53 AM, Miaoqian Lin wrote:
> The pm_runtime_enable will increase power disable depth.
> If the probe fails, we should use pm_runtime_disable() to balance
> pm_runtime_enable().
> 
> Fixes: 4f3ceca254e0 ("dmaengine: stm32-dmamux: Add PM Runtime support")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>

Thanks for your patch,

Reviewed-by: Amelie Delaunay <amelie.delaunay@foss.st.com>

> ---
>   drivers/dma/stm32-dmamux.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c
> index a42164389ebc..d5d55732adba 100644
> --- a/drivers/dma/stm32-dmamux.c
> +++ b/drivers/dma/stm32-dmamux.c
> @@ -292,10 +292,12 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
>   	ret = of_dma_router_register(node, stm32_dmamux_route_allocate,
>   				     &stm32_dmamux->dmarouter);
>   	if (ret)
> -		goto err_clk;
> +		goto pm_disable;
>   
>   	return 0;
>   
> +pm_disable:
> +	pm_runtime_disable(&pdev->dev);
>   err_clk:
>   	clk_disable_unprepare(stm32_dmamux->clk);
>   
>