On Tue, 15 Apr 2014, Stefani Seibold wrote: > I did a unbind and bind of the ehci-pci and ohci-pci, after this i got > the following dmesg log: > > ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver > ehci-pci: EHCI PCI platform driver > ehci-pci 0000:00:17.2: EHCI Host Controller > ehci-pci 0000:00:17.2: new USB bus registered, assigned bus number 1 > ehci-pci 0000:00:17.2: irq 22, io mem 0xc0006800 > ehci-pci 0000:00:17.2: USB 2.0 started, EHCI 1.00 > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 5 ports detected > ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver > ohci_hcd 0000:00:17.0: OHCI Host Controller > ohci_hcd 0000:00:17.0: new USB bus registered, assigned bus number 2 > ohci_hcd 0000:00:17.0: irq 20, io mem 0xc0004000 > hub 2-0:1.0: USB hub found > hub 2-0:1.0: 3 ports detected > ohci_hcd 0000:00:17.1: OHCI Host Controller > ohci_hcd 0000:00:17.1: new USB bus registered, assigned bus number 3 > ohci_hcd 0000:00:17.1: irq 21, io mem 0xc0005000 > hub 3-0:1.0: USB hub found > hub 3-0:1.0: 2 ports detected ... > usbcore: registered new interface driver USB-SATA-storage > USB SATA Mass Storage support registered. > usb 1-4: new high-speed USB device number 4 using ehci-pci > xxxx: ports detected What driver is this? I've never heard of USB-SATA-storage. > ohci_hcd 0000:00:17.0: remove, state 1 > usb usb2: USB disconnect, device number 1 > usb 2-2: USB disconnect, device number 2 > usb 2-2.1: USB disconnect, device number 3 > usb 2-2.2: USB disconnect, device number 4 > ohci_hcd 0000:00:17.0: USB bus 2 deregistered > ohci_hcd 0000:00:17.1: remove, state 1 > usb usb3: USB disconnect, device number 1 > ohci_hcd 0000:00:17.1: USB bus 3 deregistered > ehci-pci 0000:00:17.2: remove, state 1 > usb usb1: USB disconnect, device number 1 > usb 1-2: USB disconnect, device number 2 > usb 1-4: USB disconnect, device number 4 > ehci-pci 0000:00:17.2: USB bus 1 deregistered > ohci_hcd 0000:00:17.0: OHCI Host Controller > ohci_hcd 0000:00:17.0: new USB bus registered, assigned bus number 1 > ohci_hcd 0000:00:17.0: irq 20, io mem 0xc0004000 > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 3 ports detected > ohci_hcd 0000:00:17.1: OHCI Host Controller > ohci_hcd 0000:00:17.1: new USB bus registered, assigned bus number 2 > ohci_hcd 0000:00:17.1: irq 21, io mem 0xc0005000 > hub 2-0:1.0: USB hub found > hub 2-0:1.0: 2 ports detected > ehci-pci 0000:00:17.2: EHCI Host Controller > ehci-pci 0000:00:17.2: new USB bus registered, assigned bus number 3 > ehci-pci 0000:00:17.2: irq 22, io mem 0xc0006800 > ehci-pci 0000:00:17.2: USB 2.0 started, EHCI 1.00 > hub 3-0:1.0: USB hub found > hub 3-0:1.0: 5 ports detected > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 3 ports detected > hub 2-0:1.0: USB hub found > hub 2-0:1.0: 2 ports detected > usb 3-2: new high-speed USB device number 2 using ehci-pci > hub 3-2:1.0: USB hub found > hub 3-2:1.0: 4 ports detected > usb 3-4: new high-speed USB device number 4 using ehci-pci > usb 3-4: device descriptor read/64, error -110 > usb 3-4: device descriptor read/64, error -110 > usb 3-4: new high-speed USB device number 5 using ehci-pci > usb 3-4: device descriptor read/64, error -110 > usb 3-4: device descriptor read/64, error -110 > usb 3-4: new high-speed USB device number 6 using ehci-pci > usb 3-4: device descriptor read/8, error -110 > usb 3-4: device descriptor read/8, error -110 > usb 3-4: new high-speed USB device number 7 using ehci-pci > usb 3-4: device descriptor read/8, error -110 > usb 3-4: device descriptor read/8, error -110 > hub 3-0:1.0: unable to enumerate USB device on port 4 > usb 1-2: new full-speed USB device number 2 using ohci_hcd > hub 1-2:1.0: USB hub found > hub 1-2:1.0: 2 ports detected > usb 2-2: new full-speed USB device number 2 using ohci_hcd > usb 2-2: device descriptor read/64, error -110 > usb 2-2: device descriptor read/64, error -110 > usb 2-2: new full-speed USB device number 3 using ohci_hcd > usb 2-2: device descriptor read/64, error -110 > usb 2-2: device descriptor read/64, error -110 > usb 2-2: new full-speed USB device number 4 using ohci_hcd > usb 2-2: device descriptor read/8, error -110 > usb 2-2: device descriptor read/8, error -110 > usb 2-2: new full-speed USB device number 5 using ohci_hcd > usb 2-2: device descriptor read/8, error -110 > usb 2-2: device descriptor read/8, error -110 > hub 2-0:1.0: unable to enumerate USB device on port 2 > usb 1-2.1: new full-speed USB device number 3 using ohci_hcd > usb 1-2.2: new low-speed USB device number 4 using ohci_hcd > input: Rohde&Schwarz FrontPanel USB Keyboard as /devices/pci0000:00/0000:00:17.0/usb1/1-2/1-2.2/1-2.2:1.0/input/input2 > input: Rohde&Schwarz FrontPanel USB Keyboard as /devices/pci0000:00/0000:00:17.0/usb1/1-2/1-2.2/1-2.2:1.1/input/input3 So two devices failed to initialize after the drivers were rebound: 3-4 and 2-2. We know that 3-4 was the mass-storage device, but I can't tell from this log what 2-2 was. > As you can see there is a difference between the USB port detected > during the boot phase and after the unbind/bind: > > hub 1-0:1.0: 5 ports detected > hub 2-0:1.0: 3 ports detected > hub 3-0:1.0: 2 ports detected > hub 1-2:1.0: 4 ports detected > hub 2-2:1.0: 2 ports detected > > echo 0000:00:17.0 >/sys/bus/pci/drivers/ohci-pci/unbind > echo 0000:00:17.1 >/sys/bus/pci/drivers/ohci-pci/unbind > echo 0000:00:17.2 >/sys/bus/pci/drivers/ehci-pci/unbind > > echo 0000:00:17.0 >/sys/bus/pci/drivers/ohci-pci/bind > echo 0000:00:17.1 >/sys/bus/pci/drivers/ohci-pci/bind > echo 0000:00:17.2 >/sys/bus/pci/drivers/ehci-pci/bind > > hub 1-0:1.0: 3 ports detected > hub 2-0:1.0: 2 ports detected > hub 3-0:1.0: 5 ports detected > hub 1-0:1.0: 3 ports detected > hub 2-0:1.0: 2 ports detected > hub 3-2:1.0: 4 ports detected > hub 1-2:1.0: 2 ports detected > > This was kernel 3.10, but i get similar results for 3.14 Of course. This is because you rebound the drivers in a different order from the binding during boot. During boot, the EHCI controller (17.2) was assigned to bus 1, and the two OHCI controllers (17.0 and 17.2) were assigned to buses 2 and 3. But when you rebound the drivers, you did 17.0 and 17.1 first, so they were assigned to buses 1 and 2. Then 17.2 was assigned to bus 3. If you had bound 17.2 and then 17.0 and 17.1, you would have gotten the same results as during boot. I can't tell why the two devices failed to initialize. Can you plug either of them into an x86-based computer and see if it shows the same behavior there? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
