linux-kernel - Re: [PATCH] usb:phy: propagate __of_usb_find

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Date:	Thu, 20 Nov 2014 13:39:49 -0600
From:	Felipe Balbi <balbi@...com>
To:	Arjun Sreedharan <arjun024@...il.com>
CC:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb:phy: propagate __of_usb_find_phy()'s error on failure

On Thu, Nov 20, 2014 at 09:23:36PM +0530, Arjun Sreedharan wrote:
> When __of_usb_find_phy() fails, it returns -ENODEV - its
> error code has to be returned by devm_usb_get_phy_by_phandle().
> Only when the former function succeeds and try_module_get()
> fails should -EPROBE_DEFER be returned.
> 
> Signed-off-by: Arjun Sreedharan <arjun024@...il.com>
> ---
>  drivers/usb/phy/phy.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
> index 045cd30..0310112 100644
> --- a/drivers/usb/phy/phy.c
> +++ b/drivers/usb/phy/phy.c
> @@ -191,7 +191,9 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
>  
>  	phy = __of_usb_find_phy(node);
>  	if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) {
> -		phy = ERR_PTR(-EPROBE_DEFER);
> +		if (!IS_ERR(phy))
> +			phy = ERR_PTR(-EPROBE_DEFER);
> +		

trailing whitespace here. I'll fix it myself this time, but next time be
more careful.

cheers

-- 
balbi

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