linux-kernel - [regression?] usb: new errors during device detection

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Date:	Sun, 3 Aug 2008 22:11:21 +0200
From:	Frans Pop <elendil@...net.nl>
To:	linux-kernel@...r.kernel.org
Cc:	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb@...r.kernel.org
Subject: [regression?] usb: new errors during device detection

Not sure how I should interpret this difference between dmesg output for
2.6.26 and 2.6.27-rc1 (after 'grep -i usb'):

 usbcore: registered new interface driver usbfs
 usbcore: registered new interface driver hub
 usbcore: registered new device driver usb
 USB Universal Host Controller Interface driver v3.0
 uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
 usb usb1: configuration #1 chosen from 1 choice
 hub 1-0:1.0: USB hub found
 uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
 usb usb2: configuration #1 chosen from 1 choice
 hub 2-0:1.0: USB hub found
 uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
 usb usb3: configuration #1 chosen from 1 choice
 hub 3-0:1.0: USB hub found
 uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
 usb usb4: configuration #1 chosen from 1 choice
 hub 4-0:1.0: USB hub found
+usb 3-1: new low speed USB device using uhci_hcd and address 2
 ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 5
 ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
 usb usb5: configuration #1 chosen from 1 choice
 hub 5-0:1.0: USB hub found
-usb 3-1: new low speed USB device using uhci_hcd and address 2
+usb 3-1: device not accepting address 2, error -71
+hub 3-0:1.0: unable to enumerate USB device on port 1
+usb 3-1: new low speed USB device using uhci_hcd and address 4
 usb 3-1: configuration #1 chosen from 1 choice
 usb 4-1: new low speed USB device using uhci_hcd and address 2
 usb 4-1: configuration #1 chosen from 1 choice
 usbcore: registered new interface driver hiddev
 input: USB Compliant Keyboard as /class/input/input0
 input: USB HID v1.10 Keyboard [USB Compliant Keyboard] on usb-0000:00:1d.2-1
 input: USB Compliant Keyboard as /class/input/input1
 input: USB HID v1.10 Device [USB Compliant Keyboard] on usb-0000:00:1d.2-1
 input: Logitech USB Receiver as /class/input/input2
 input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:1d.3-1
 usbcore: registered new interface driver usbhid
 usbhid: v2.6:USB HID core driver

Note that 3-1 is first assigned address 2 and then 4. With 2.6.26 3-1 did
not have any problem accepting address 2. I assume the "unable to enumerate"
error is a result of the rejection of the address?

Problem is reproducible (not limited to a single boot).

Full dmesg and kernel config attached.

Cheers,
FJP


View attachment "2.6.27-rc1" of type "text/plain" (33381 bytes)

View attachment "config-2.6.27-rc1" of type "text/plain" (60734 bytes)