On Wed, 18 Nov 2009, Alexander Holler wrote: > Hello, > > I've done some more tests and have some more findings. > > After the problem occured (which looks for me like a timeout during a > wait for a CSW), ehci_hcd doesn't work anymore. Low- and full-speed > devices are still working and are recognized correctly, but no > high-speed device. After unloading ehci_hcd and reloading it, high-speed > devices are recognized correctly again. > As unloading is no option for kernels which have ehci_hcd compiled in > (like the F11-kernel), is there another option to reset the driver? You can unbind ehci-hcd from the controller by writing the controller's name to the "unbind" attribute in the appropriate sysfs directory. For example, on my system: # ls /sys/bus/pci/drivers/ehci_hcd 0000:00:1d.7 0000:01:00.2 0000:01:01.2 bind module new_id uevent unbind # echo -n 0000:00:1d.7 >/sys/bus/pci/drivers/ehci_hcd/unbind Then to rebind the driver, write the device name to the "bind" attribute: # echo -n 0000:00:1d.7 >/sys/bus/pci/drivers/ehci_hcd/bind 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
