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Message-ID: <1397588786.21892.4.camel@vger.seibold.net> Date: Tue, 15 Apr 2014 21:06:26 +0200 From: Stefani Seibold <stefani@...bold.net> To: Alan Stern <stern@...land.harvard.edu> Cc: linux-usb <linux-usb@...r.kernel.org>, Kernel development list <linux-kernel@...r.kernel.org>, Greg KH <greg@...ah.com>, Sarah Sharp <sarah.a.sharp@...ux.intel.com>, andreas.brief@...de-schwarz.com Subject: Re: Missing USB XHCI and EHCI reset for kexec Am Dienstag, den 15.04.2014, 15:02 -0400 schrieb Alan Stern: > 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. > This is a special embedded USB SATA driver written by me. It is mostly a fork of the usb-storage driver but handle only one vendor and product ID and does switch on a port bit. On the other side this vendor and product ID is black listed in the regular usb-storage driver. > > 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-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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