Re: kernel NULL pointer dereference at (null) - inside hub_disconnect

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On Monday, November 04, 2013 4:22:04 PM Alan Stern wrote:
> On Mon, 4 Nov 2013, Luke-Jr wrote:
> > Perhaps I phrased that wrong: I suspect this is a hardware issue or
> > firmware bug, triggering bad error handling in Linux. After upgrading to
> > 3.12, Linux indeed survives the hub being plugged in, and the hub is
> > usable, but I still see various errors in dmesg.
> 
> What errors?

[33454.079555] usb 2-1: Parent hub missing LPM exit latency info.  Power 
management will be impacted.
[33454.080514] xhci_hcd 0000:03:00.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff88006e5cfd80


[33436.081842] hub 2-1:1.0: USB hub found
[33436.082326] hub 2-1:1.0: 4 ports detected
[33436.284763] hub 2-1:1.0: hub_port_status failed (err = -71)
[33436.285139] xhci_hcd 0000:03:00.0: URB transfer length is wrong, xHC issue? 
req. len = 4, act. len = 4294967292
[33436.285156] hub 2-1:1.0: hub_port_status failed (err = 0)
[33436.285399] hub 2-1:1.0: hub_port_status failed (err = -71)
[33436.285629] hub 2-1:1.0: hub_port_status failed (err = -71)


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