linux-kernel - Re: [REGRESSION][BISECTED] "xHCI host controller not responding, assume dead" on stable kernel

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Date: Tue, 21 May 2024 14:29:15 +0300
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: Gia <giacomo.gio@...il.com>
Cc: Mario Limonciello <mario.limonciello@....com>,
	Christian Heusel <christian@...sel.eu>,
	Linux regressions mailing list <regressions@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"kernel@...ha.zone" <kernel@...ha.zone>,
	Andreas Noever <andreas.noever@...il.com>,
	Michael Jamet <michael.jamet@...el.com>,
	Yehezkel Bernat <YehezkelShB@...il.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	Benjamin Böhmke <benjamin@...hmke.net>,
	"S, Sanath" <Sanath.S@....com>
Subject: Re: [REGRESSION][BISECTED] "xHCI host controller not responding,
 assume dead" on stable kernel > 6.8.7

On Tue, May 21, 2024 at 11:24:56AM +0200, Gia wrote:
> Thank you for your suggestion Mika, as a general rule I totally agree
> with you and I do not mess with kernel default parameters, but I
> remember "pcie_aspm=off" was necessary at the time I set up the
> system. Probably a kernel or a BIOS update makes it unnecessary today.

Okay, thanks.

> I see it removes these messages from my logs but I trust you when you
> say they have not an impact on functionality:
> 
> May 21 11:01:36 um773arch kernel: pcieport 0000:05:04.0: Unable to
> change power state from D3hot to D0, device inaccessible
> May 21 11:01:36 um773arch kernel: igb 0000:09:00.0 eth0: PCIe link lost
> May 21 11:01:36 um773arch kernel: xhci_hcd 0000:08:00.0: xHCI host
> controller not responding, assume dead
> May 21 11:01:36 um773arch kernel: xhci_hcd 0000:07:00.0: xHCI host
> controller not responding, assume dead

Correct these are side-effect of the USB4 topology reset we do. As
explained earlier the tunnels get re-established and the devices will
come back soon after this.