linux-kernel - Re: Missing USB XHCI and EHCI reset for kexec

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Message-ID: <1402128942.3247.292.camel@pasglop>
Date:	Sat, 07 Jun 2014 18:15:42 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>
Cc:	linux-usb <linux-usb@...r.kernel.org>,
	linux-kernel@...r.kernel.org, Greg KH <greg@...ah.com>,
	Alan Stern <stern@...land.harvard.edu>,
	sarah.a.sharp@...ux.intel.com
Subject: Re: Missing USB XHCI and EHCI reset for kexec

On Tue, 2014-04-15 at 20:54 +0200, Stefani Seibold wrote:

> > > > > >>>>[    1.170029] xhci_hcd 0001:03:00.0: xHCI Host Controller
> > > > > >>>>[    1.175306] xhci_hcd 0001:03:00.0: new USB bus registered,
> > > > > >>>>assigned bus number 1
> > > > > >>>>[    1.212561] xhci_hcd 0001:03:00.0: Host not halted after 16000
> > > > > >>>>microseconds.
> > > > > >>>>[    1.219621] xhci_hcd 0001:03:00.0: can't setup: -110
> > > > > >>>>[    1.224597] xhci_hcd 0001:03:00.0: USB bus 1 deregistered
> > > > > >>>>[    1.230021] xhci_hcd 0001:03:00.0: init 0001:03:00.0 fail, -110
> > > > > >>>>[    1.235955] xhci_hcd: probe of 0001:03:00.0 failed with error -110
> > > > > >>>>

Cascardo, Alan,

Bringing back that old thread..

I'm trying to kexec from our OPAL FW bootloader (3.10.23 based) to a
fedora 3.14.3 on a new machine and am still seeing the above.

A reset brings the chip back.

Do we have any resolution here ? It looks like the xHCI remains active
on the way out and is clagged up on the way back in, at least in a
state the driver really doesn't like.

And this is a "clean" kexec, not a forced one... This is killing USB on
the upcoming OpenPower dev machines.

Cheers,
Ben.


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