linux-kernel - Re: [PATCH 1/3] usb: musb: fix pm

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Date:	Thu, 15 Dec 2011 18:22:15 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Felipe Contreras <felipe.contreras@...il.com>
cc:	linux-usb@...r.kernel.org, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Jiri Kosina <trivial@...nel.org>
Subject: Re: [PATCH 1/3] usb: musb: fix pm_runtime mismatches

On Fri, 16 Dec 2011, Felipe Contreras wrote:

> Properly call pm_runtime_put() afer pm_runttime_get() on errors.
> 
> Untested.
> 
> Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
> ---
>  drivers/usb/musb/musb_gadget.c |    1 +
>  drivers/usb/musb/omap2430.c    |    1 +
>  2 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
> index 922148f..95bfd2d 100644
> --- a/drivers/usb/musb/musb_gadget.c
> +++ b/drivers/usb/musb/musb_gadget.c
> @@ -1960,6 +1960,7 @@ static int musb_gadget_start(struct usb_gadget *g,
>  err2:
>  	if (!is_otg_enabled(musb))
>  		musb_stop(musb);
> +	pm_runtime_put(musb->controller);
>  err0:
>  	return retval;
>  }
> diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
> index ba85f27..4edfb91 100644
> --- a/drivers/usb/musb/omap2430.c
> +++ b/drivers/usb/musb/omap2430.c
> @@ -385,6 +385,7 @@ static void omap2430_musb_disable(struct musb *musb)
>  
>  static int omap2430_musb_exit(struct musb *musb)
>  {
> +	pm_runtime_put(musb->controller);
>  	del_timer_sync(&musb_idle_timer);
>  
>  	omap2430_low_level_exit(musb);

Should these calls be pm_runtime_put_sync() instead of 
pm_runtime_put()?

Alan Stern

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