linux-kernel - Re: [PATCH V2] usb: dwc3: gadget: Let pm runtime get/put paired

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Message-ID: <2023080128-bubble-frosty-92c8@gregkh>
Date:   Tue, 1 Aug 2023 06:43:58 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Elson Serrao <quic_eserrao@...cinc.com>
Cc:     Surong Pang <surong.pang@...soc.com>, Thinh.Nguyen@...opsys.com,
        felipe.balbi@...ux.intel.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, rogerq@...nel.org,
        Orson.Zhai@...soc.com, Chunyan.Zhang@...soc.com,
        Zhiyong.liu@...soc.com, Surong.Pang@...il.com
Subject: Re: [PATCH V2] usb: dwc3: gadget: Let pm runtime get/put paired

On Mon, Jul 31, 2023 at 06:33:04PM -0700, Elson Serrao wrote:
> 
> 
> On 7/31/2023 6:15 PM, Surong Pang wrote:
> > Pm_runtime_get is called when setting pending_events to true.
> > Pm_runtime_put is needed for pairing with pm_runtime_get.
> > 
> > Fixes: fc8bb91bc83e ("usb: dwc3: implement runtime PM")
> > Signed-off-by: Surong Pang <surong.pang@...soc.com>
> > 
> > ---
> > V2: add Fixes tag, fix Fixes tag
> > ---
> >   drivers/usb/dwc3/gadget.c | 1 +
> >   1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> > index 5fd067151fbf..9c835c5f9928 100644
> > --- a/drivers/usb/dwc3/gadget.c
> > +++ b/drivers/usb/dwc3/gadget.c
> > @@ -4720,5 +4720,6 @@ void dwc3_gadget_process_pending_events(struct dwc3 *dwc)
> >   		dwc3_interrupt(dwc->irq_gadget, dwc->ev_buf);
> >   		dwc->pending_events = false;
> >   		enable_irq(dwc->irq_gadget);
> > +		pm_runtime_put(dwc->dev);
> >   	}
> >   }
> 
> I am already handling this change as part of below series. Will be uploading
> a separate patch based on the feedback from Roger.
> 
> https://lore.kernel.org/all/be57511d-2005-a1f5-d5a5-809e71029aec@quicinc.com/

But this should be fixed now, and properly backported to stable kernels.
There's no need to wait for a different patch series if this one is
correct, right?

thanks,

greg k-h