Re: Suspend to disk with usb connected fails to detect usb(reset) during resume

[Alan Stern]

On Tue, 7 Nov 2017, Ivid Suvarna wrote:

> Hi,
> 
> I am trying to support suspend to disk(hibernate) on Hikey with 4.4
> kernel. During suspend, I could see the usb devices getting reset and I
> can access them properly. Message can be seen as below:
> 
> usb 1-1: reset high-speed USB device number 2 using dwc2
> usb 1-1.2: reset high-speed USB device number 3 using dwc2
> usb 1-1.2.4: reset high-speed USB device number 4 using dwc2

You might start by asking why the devices need to be reset during 
suspend.  I can't see any reason for doing this.

Alan Stern