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Message-ID: <1397586616.20840.4.camel@vger.seibold.net> Date: Tue, 15 Apr 2014 20:30:16 +0200 From: Stefani Seibold <stefani@...bold.net> To: Alan Stern <stern@...land.harvard.edu> Cc: linux-usb <linux-usb@...r.kernel.org>, linux-kernel@...r.kernel.org, Greg KH <greg@...ah.com>, sarah.a.sharp@...ux.intel.com, andreas.brief@...de-schwarz.com Subject: Re: Missing USB XHCI and EHCI reset for kexec Am Montag, den 14.04.2014, 12:27 -0400 schrieb Alan Stern: > On Mon, 14 Apr 2014 stefani@...bold.net wrote: > > > Zitat von Alan Stern <stern@...land.harvard.edu>: > > > > > > >> <6>[ 167.936921] usb 2-2.1: new full-speed USB device number 3 > > >> using ohci-pci > > >> <6>[ 168.067890] usb 2-2.1: New USB device found, idVendor=076b, > > >> idProduct=a021 > > >> <6>[ 168.074871] usb 2-2.1: New USB device strings: Mfr=1, Product=2, > > >> SerialNumber=0 > > >> <6>[ 168.082226] usb 2-2.1: Product: Smart Card Reader > > >> <6>[ 168.086963] usb 2-2.1: Manufacturer: USB > > >> <6>[ 168.172893] usb 2-2.2: new low-speed USB device number 4 > > >> using ohci-pci > > >> <6>[ 168.300839] usb 2-2.2: New USB device found, idVendor=0aad, > > >> idProduct=0024 > > >> <6>[ 168.307823] usb 2-2.2: New USB device strings: Mfr=1, Product=2, > > >> SerialNumber=0 > > >> <6>[ 168.315180] usb 2-2.2: Product: FrontPanel USB Keyboard > > >> <6>[ 168.320436] usb 2-2.2: Manufacturer: Rohde&Schwarz > > >> <6>[ 168.337895] input: Rohde&Schwarz FrontPanel USB Keyboard as > > >> /devices/pci0000:00/0000:00:17.0/usb2/2-2/2-2.2/2-2.2:1.0/input/input0 > > >> <6>[ 168.360988] input: Rohde&Schwarz FrontPanel USB Keyboard as > > >> /devices/pci0000:00/0000:00:17.0/usb2/2-2/2-2.2/2-2.2:1.1/input/input1 > > > > > > Since some devices work and some don't, maybe part of the problem lies > > > in the particular devices. > > > > > > > The problem lies on the "Bus 001 Device 002: ID 0424:2514 Standard > > Microsystems Corp. USB 2.0 Hub", which hangs for arround 162 seconds > > after a kexec. > > > > The "Bus 002 Device 003: ID 076b:a021 OmniKey AG CCID Smart Card > > Reader" and "Bus 002 Device 004: ID 0aad:0024 Rohde & Schwarz GmbH & > > Co. KG" are attached to this Hub. > > > What about if you just do: > > > > > > rmmod ehci-pci > > > modprobe ehci-pci > > > > > > > The kernel is monolitic because the USB HW is needed in a early boot > > stage. The problem also occurs with ehci-fsl used in by an other > > PowerPC device, which is a part of the SoC and is not attached to the > > PCI bus. > > > > One thing is that the "echo 1 > > >/sys/bus/pci/drivers/ehci-pci/0000\:00\:17.2/reset" workaround will > > no longer work for kernel 3.14. > > Instead, you could try > > echo 0000:00:17.2 >/sys/bus/pci/drivers/ehci-pci/unbind > echo 0000:00:17.2 >/sys/bus/pci/drivers/ehci-pci/bind > 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 Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007) mousedev: PS/2 mouse device common for all mice i2c /dev entries driver mpc-i2c fef03000.i2c: timeout 1000000 us rtc-rs5c372 0-0032: rs5c372a found, 24hr, driver version 0.6 rtc-rs5c372 0-0032: rtc core: registered rtc-rs5c372 as rtc0 mpc-i2c fef03100.i2c: timeout 1000000 us usbcore: registered new interface driver usbhid usbhid: USB HID core driver rsfrontp: using key table SMBV (117) usbcore: registered new interface driver rsfrontp rsfrontp: R&S USB HID Frontpanel driver (v1.2) usbcore: registered new interface driver rsknop rsknop: R&S USB HID Knop support (v1.4) usb 1-2: new high-speed USB device number 2 using ehci-pci zram: Created 1 device(s) ... TCP: cubic registered NET: Registered protocol family 17 rtc-rs5c372 0-0032: setting system clock to 2014-04-14 14:51:50 UTC (1397487110) Freeing unused kernel memory: 996K (c032e000 - c0427000) hub 1-2:1.0: USB hub found hub 1-2:1.0: 4 ports detected yaffs: dev is 32505859 name is "mtdblock3" rw yaffs: passed flags "" yaffs: yaffs: Attempting MTD mount of 31.3,"mtdblock3" yaffs: auto selecting yaffs2 yaffs: yaffs_read_super: is_checkpointed 1 usb 2-2: new full-speed USB device number 2 using ohci_hcd hub 2-2:1.0: USB hub found hub 2-2:1.0: 2 ports detected usbcore: registered new interface driver usb-storage usb 2-2.1: new full-speed USB device number 3 using ohci_hcd usb 2-2.2: new low-speed USB device number 4 using ohci_hcd input: Rohde&Schwarz FrontPanel USB Keyboard as /devices/pci0000:00/0000:00:17.0/usb2/2-2/2-2.2/2-2.2:1.0/input/input0 fsl-gianfar fef24000.ethernet eth0: mac: 00:90:b8:1b:36:37 input: Rohde&Schwarz FrontPanel USB Keyboard as /devices/pci0000:00/0000:00:17.0/usb2/2-2/2-2.2/2-2.2:1.1/input/input1 fsl-gianfar fef24000.ethernet eth0: Running with NAPI enabled fsl-gianfar fef24000.ethernet eth0: RX BD ring size for Q[0]: 256 fsl-gianfar fef24000.ethernet eth0: TX BD ring size for Q[0]: 256 >udevd[114]: starting version 171 libphy: mdio@...24520:00 - Link is Up - 100/Full Adding 131068k swap on /dev/zram0. Priority:-1 extents:1 across:131068k SS Initializing SATA USB Mass Storage driver... 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 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 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 - Stefani -- 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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