Re: xhci spew with iphone since iOS7

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On Fri, Oct 25, 2013 at 10:27:56AM -0400, Alan Stern wrote:
 > On Fri, 25 Oct 2013, Dave Jones wrote:
 > 
 > > Xhci got a lot noisier since I recently updated my phone to the newer version of iOS.
 > > Possibly it's related to the new feature where it pops up a dialog on the phone
 > > asking if I trust the machine I've plugged into?
 > > 
 > > This is from an 3.12-rc6 kernel:
 > > 
 > > xhci_hcd 0000:00:14.0: Port Status Change Event for port 2
 > > xhci_hcd 0000:00:14.0: resume root hub
 > > xhci_hcd 0000:00:14.0: handle_port_status: starting port polling.
 > > usb usb3: usb wakeup-resume
 > > usb usb3: usb auto-resume
 > > hub 3-0:1.0: hub_resume
 > > xhci_hcd 0000:00:14.0: get port status, actual port 0 status  = 0x2a0
 > > xhci_hcd 0000:00:14.0: Get port status returned 0x100
 > > xhci_hcd 0000:00:14.0: get port status, actual port 1 status  = 0x20ae1
 > > xhci_hcd 0000:00:14.0: Get port status returned 0x10301
 > ...
 > 
 > All, or almost all, of these are merely debug-level messages.
 
Hmm, somehow I never noticed as much in the past.
Maybe I didn't have USB_DEBUG enabled back then.

 > Besides, how does this differ from what you get when you plug in a 
 > phone running the older iOS?

Unfortunatly cron has purged the older logs, so I've not got any examples,
but I'm pretty sure it was less alarming.

I'll just turn USB_DEBUG back off, I'm not even sure how it got turned on.

thanks,

	Dave

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