linux-kernel - Re: [PATCH] usb: gadget: dummy

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Date:	Sat, 2 Oct 2010 10:31:20 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Rahul Ruikar <rahul.ruikar@...il.com>
cc:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: gadget: dummy_hcd: Fix error path

On Sat, 2 Oct 2010, Rahul Ruikar wrote:

> In function dummy_udc_probe()
> call put_device() when device_register() fails.
> 
> Signed-off-by: Rahul Ruikar <rahul.ruikar@...il.com>
> ---
>  drivers/usb/gadget/dummy_hcd.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
> index dc65462..2548091 100644
> --- a/drivers/usb/gadget/dummy_hcd.c
> +++ b/drivers/usb/gadget/dummy_hcd.c
> @@ -885,8 +885,10 @@ static int dummy_udc_probe (struct platform_device *pdev)
>  	dum->gadget.dev.parent = &pdev->dev;
>  	dum->gadget.dev.release = dummy_gadget_release;
>  	rc = device_register (&dum->gadget.dev);
> -	if (rc < 0)
> +	if (rc < 0) {
> +		put_device(&dum->gadget.dev);
>  		return rc;
> +	}
>  
>  	usb_get_hcd (dummy_to_hcd (dum));

Acked-by: Alan Stern <stern@...land.harvard.edu>

Similar changes are needed in net2280.c, file_storage.c and
f_mass_storage.c, probably also in goku_udc.c and langwell_udc.c.  
Would you like to make them?

Alan Stern

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