linux-kernel - Re: [PATCH next] usb: usbfs: Add reset

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Message-ID: <2a80d11d-029f-4e7e-9a8e-3abae1034add@suse.com>
Date: Mon, 15 Jul 2024 10:53:14 +0200
From: Oliver Neukum <oneukum@...e.com>
To: Alan Stern <stern@...land.harvard.edu>, Oliver Neukum <oneukum@...e.com>
Cc: Hongyu Xie <xiehongyu1@...inos.cn>, gregkh@...uxfoundation.org,
 brauner@...nel.org, jlayton@...nel.org, jack@...e.cz,
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH next] usb: usbfs: Add reset_resume for usbfs



On 11.07.24 16:41, Alan Stern wrote:
> On Thu, Jul 11, 2024 at 10:59:56AM +0200, Oliver Neukum wrote:

>> I am sorry, but this implementation has some fundamental issues.
> 
> Agreed, but the solution is pretty simple.  Because the device was
> suspended, the userspace driver must have enabled suspend via the
> USBDEVFS_ALLOW_SUSPEND ioctl.

The whole system could have been suspended, in particularly to S4.

	Regards
		Oliver