linux-kernel - Re: [v3 PATCH] usb: create usb_debug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 28 May 2019 16:49:45 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Felipe Balbi <felipe.balbi@...ux.intel.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [v3 PATCH] usb: create usb_debug_root for gadget only

Hi Felipe,
On Tue, 2019-05-28 at 11:11 +0300, Felipe Balbi wrote:
> Hi,
> 
> Chunfeng Yun <chunfeng.yun@...iatek.com> writes:
> > diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
> > index 7fcb9f782931..88b3ee03a12d 100644
> > --- a/drivers/usb/core/usb.c
> > +++ b/drivers/usb/core/usb.c
> > @@ -1190,7 +1190,7 @@ EXPORT_SYMBOL_GPL(usb_debug_root);
> >  
> >  static void usb_debugfs_init(void)
> >  {
> > -	usb_debug_root = debugfs_create_dir("usb", NULL);
> > +	usb_debug_root = debugfs_create_dir(USB_DEBUG_ROOT_NAME, NULL);
> >  	debugfs_create_file("devices", 0444, usb_debug_root, NULL,
> >  			    &usbfs_devices_fops);
> >  }
> 
> might be a better idea to move this to usb common. 
Good idea, I forgot there is a common file.

> Then have a function
> which can be called by both host and gadget to maybe create the
> directory:
I'll try it.

Thanks a lot

> 
> static struct dentry *usb_debug_root;
> 
> struct dentry *usb_debugfs_init(void)
> {
> 	if (!usb_debug_root)
>         	usb_debug_root = debugfs_create_dir("usb", NULL);
> 
> 	return usb_debug_root;
> }
> 
> 
> Then usb core would be updated to something like:
> 
> static void usb_core_debugfs_init(void)
> {
> 	struct dentry *root = usb_debugfs_init();
> 
> 	debugfs_create_file("devices", 0444, root, NULL, &usbfs_devices_fops);
> }
>