linux-kernel - Re: 3.18 regression: Error while assigning device slot ID, USB3 devices not detected

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Message-ID: <CA+5PVA65KS+_ujc2yQ=zOnFPMZz__2K8Vm+wV5YJKkuEuHwn3Q@mail.gmail.com>
Date:	Mon, 19 Jan 2015 08:28:19 -0500
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Robert Hancock <hancockrwd@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Linux-usb <linux-usb@...r.kernel.org>
Subject: Re: 3.18 regression: Error while assigning device slot ID, USB3
 devices not detected

On Sun, Jan 18, 2015 at 1:25 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Sun, Jan 18, 2015 at 12:08:18AM -0600, Robert Hancock wrote:
>> I've got an Intel Haswell-based system with a Gigabyte Z87X-D3H motherboard
>> under Fedora 21. After updating to the 3.18.2-200 Fedora kernel, I noticed
>> some errors in dmesg and at least some of my USB3 ports don't recognize any
>> USB3 devices plugged into them:
>>
>> [    0.560838] xhci_hcd 0000:00:14.0: Error while assigning device slot ID
>> [    0.560912] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host
>> supports is 32.
>> [    0.560990] usb usb2-port2: couldn't allocate usb_device
>> [    0.561098] xhci_hcd 0000:00:14.0: Error while assigning device slot ID
>> [    0.561163] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host
>> supports is 32.
>> [    0.561239] usb usb2-port5: couldn't allocate usb_device
>> [    0.561344] xhci_hcd 0000:00:14.0: Error while assigning device slot ID
>> [    0.561409] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host
>> supports is 32.
>> [    0.561484] usb usb2-port6: couldn't allocate usb_device
>>
>> This worked fine under 3.17. Is this a known problem?
>
> Yes it is, should be fixed in Linus's tree now and will be backported to
> the latest 3.18-stable tree in a week or so.

Do you happen to know the commit id?

josh
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