linux-kernel - Re: [PATCH 2/4] usb: dwc3: dwc3-omap: return -EPROBE

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Message-ID: <20130305145645.GG12123@arwen.pp.htv.fi>
Date:	Tue, 5 Mar 2013 16:56:45 +0200
From:	Felipe Balbi <balbi@...com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	<grant.likely@...retlab.ca>, <rob.herring@...xeda.com>,
	<rob@...dley.net>, <balbi@...com>, <gregkh@...uxfoundation.org>,
	<s-guiriec@...com>, <gg@...mlogic.co.uk>, <sameo@...ux.intel.com>,
	<broonie@...nsource.wolfsonmicro.com>, <ldewangan@...dia.com>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: Re: [PATCH 2/4] usb: dwc3: dwc3-omap: return -EPROBE_DEFER if probe
 has not yet executed

On Tue, Mar 05, 2013 at 07:51:58PM +0530, Kishon Vijay Abraham I wrote:
> return -EPROBE_DEFER from dwc3_omap_mailbox in dwc3-omap.c, if the probe of
> dwc3-omap has not yet been executed or failed.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
>  drivers/usb/dwc3/dwc3-omap.c  |    7 +++++--
>  include/linux/usb/dwc3-omap.h |    6 +++---
>  2 files changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
> index 19c6e72..9428f4e 100644
> --- a/drivers/usb/dwc3/dwc3-omap.c
> +++ b/drivers/usb/dwc3/dwc3-omap.c
> @@ -138,11 +138,14 @@ static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
>  	writel(value, base + offset);
>  }
>  
> -void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
> +int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
>  {
>  	u32			val;
>  	struct dwc3_omap	*omap = _omap;
>  
> +	if (!omap)
> +		return -EPROBE_DEFER;
> +
>  	switch (status) {
>  	case OMAP_DWC3_ID_GROUND:
>  		dev_dbg(omap->dev, "ID GND\n");
> @@ -185,7 +188,7 @@ void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
>  		dev_dbg(omap->dev, "ID float\n");
>  	}
>  
> -	return;
> +	return IRQ_HANDLED;

IRQ_HANDLED ????

-- 
balbi

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