linux-kernel - Re: [usb resume regression] in 3.16-rc1

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Message-ID: <Pine.LNX.4.44L0.1406191059520.1247-100000@iolanthe.rowland.org>
Date:	Thu, 19 Jun 2014 11:02:39 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Jörg Otte <jrg.otte@...il.com>
cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [usb resume regression] in 3.16-rc1

On Thu, 19 Jun 2014, Jörg Otte wrote:

> on resume with 3.16-rc1 I get the following error messages in dmesg
> which are alltogether not present in 3.15:
> 
> [   43.518116] dpm_run_callback(): 0xffffffffa53c4120 returns -13
> [   43.518119] PM: Device 1-1 failed to resume async: error -13
> [   43.522380] hub 1-1:1.0: hub_port_status failed (err = -71)
> [   43.528538] sd 0:0:0:0: [sda] Starting disk
> [   43.530886] hub 1-1:1.0: hub_port_status failed (err = -71)
> [   43.535140] usb 1-1-port2: cannot disable (err = -71)
> [   43.535142] dpm_run_callback(): 0xffffffffa53c4120 returns -71
> [   43.535145] PM: Device 1-1.2 failed to resume async: error -71
> [   43.543673] usb 1-1-port4: cannot disable (err = -71)
> [   43.543674] dpm_run_callback(): 0xffffffffa53c4120 returns -71
> [   43.543679] PM: Device 1-1.4 failed to resume async: error -71
> 
> usb devices connected to the hub (in my case mouse and keyboard) are
> all death after resume and cannot be activated again.

-13 is -EACCES.  It's not clear what could have caused that error, 
since EACCES isn't used in the USB core or in ehci-hcd.

Can you try doing the same thing after enabling dynamic debugging in 
usbcore and ehci-hcd?

Alan Stern

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