linux-kernel - Re: [PATCH 02/11] USB: dwc3: fix runtime pm imbalance on unbind

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Date:   Tue, 11 Apr 2023 01:22:30 +0000
From:   Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To:     Johan Hovold <johan+linaro@...nel.org>
CC:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Li Jun <jun.li@....com>
Subject: Re: [PATCH 02/11] USB: dwc3: fix runtime pm imbalance on unbind

On Tue, Apr 04, 2023, Johan Hovold wrote:
> Make sure to balance the runtime PM usage count on driver unbind by
> adding back the pm_runtime_allow() call that had been erroneously
> removed.
> 
> Fixes: 266d0493900a ("usb: dwc3: core: don't trigger runtime pm when remove driver")
> Cc: stable@...r.kernel.org	# 5.9
> Cc: Li Jun <jun.li@....com>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  drivers/usb/dwc3/core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 5058bd8d56ca..9f8c988c25cb 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -1979,6 +1979,7 @@ static int dwc3_remove(struct platform_device *pdev)
>  	dwc3_core_exit(dwc);
>  	dwc3_ulpi_exit(dwc);
>  
> +	pm_runtime_allow(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
>  	pm_runtime_put_noidle(&pdev->dev);
>  	pm_runtime_set_suspended(&pdev->dev);
> -- 
> 2.39.2
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thanks,
Thinh