Re: [PATCH v2 12/13] usb: gadget: udc: gr_udc: create debugfs directory under usb root

[Greg Kroah-Hartman]

On Tue, Nov 12, 2019 at 02:51:58PM +0800, Chunfeng Yun wrote:
> Now the USB gadget subsystem can use the USB debugfs root directory,
> so move it's directory from the root of the debugfs filesystem into
> the root of usb
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> ---
> v2:
>   1. abandon new API usb_debugfs_create_dir(), and use usb_debug_root
> ---
>  drivers/usb/gadget/udc/gr_udc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
> index 7a0e9a58c2d8..5faa09a6c770 100644
> --- a/drivers/usb/gadget/udc/gr_udc.c
> +++ b/drivers/usb/gadget/udc/gr_udc.c
> @@ -208,7 +208,7 @@ static void gr_dfs_create(struct gr_udc *dev)
>  {
>  	const char *name = "gr_udc_state";
>  
> -	dev->dfs_root = debugfs_create_dir(dev_name(dev->dev), NULL);
> +	dev->dfs_root = debugfs_create_dir(dev_name(dev->dev), usb_debug_root);
>  	debugfs_create_file(name, 0444, dev->dfs_root, dev, &gr_dfs_fops);
>  }
>  

This breaks the build:
drivers/usb/gadget/udc/gr_udc.c: In function âgr_dfs_createâ:
drivers/usb/gadget/udc/gr_udc.c:211:57: error: âusb_debug_rootâ undeclared (first use in this function)
  211 |  dev->dfs_root = debugfs_create_dir(dev_name(dev->dev), usb_debug_root);
      |                                                         ^~~~~~~~~~~~~~
drivers/usb/gadget/udc/gr_udc.c:211:57: note: each undeclared identifier is reported only once for each function it appears in
make[4]: *** [scripts/Makefile.build:265: drivers/usb/gadget/udc/gr_udc.o] Error 1

so I've dropped it from the patch series.

Please fix up and resend.

And of course, always test-build your patches before you send them
out...

greg k-h