Hi, here is some additional insight:
I worked around the panic by modifying my drivers completion function to no call complete() if the device has been removed. That means I can replug the device now without the panic. Log when I replug now looks like that: Jan 20 13:28:47 koffer kernel: uhci_irq status = 36, uhci->state = -10 Jan 20 13:28:47 koffer kernel: uhci_remove_pending_qhs process cef33b00 Jan 20 13:28:47 koffer kernel: >>> uhci_finish_urb cef33b00 Jan 20 13:28:47 koffer kernel: >>> uhci_set_next_interrupt Jan 20 13:28:47 koffer kernel: << uhci_set_next_interrupt Jan 20 13:28:47 koffer kernel: >>> giveback cef33b00 Jan 20 13:28:47 koffer kernel: spheroncam.c: spheroncam_complete urb: cef33b00 status: -104 Jan 20 13:28:47 koffer kernel: << giveback cef33b00 Jan 20 13:28:47 koffer kernel: << uhci_finish_urb cef33b00 Jan 20 13:28:47 koffer kernel: drivers/usb/host/uhci-hcd.c: e400: wakeup_hc # ... here come a few giveback calls, then... Jan 20 13:28:47 koffer kernel: hub 1-0:1.0: new USB device on port 1, assigned address 3 Jan 20 13:28:52 koffer kernel: usb 1-1: control timeout on ep0out Jan 20 13:28:52 koffer kernel: >>> uhci_urb_dequeue cef337a0 e400 Jan 20 13:28:52 koffer kernel: >>> uhci_set_next_interrupt e400 Jan 20 13:28:52 koffer kernel: << uhci_set_next_interrupt e400 Jan 20 13:28:52 koffer kernel: uhci_urb_dequeue cef337a0 list_empty == true e400Jan 20 13:28:52 koffer kernel: >>> uhci_set_next_interrupt e400 Jan 20 13:28:52 koffer kernel: << uhci_set_next_interrupt e400 Jan 20 13:28:52 koffer kernel: << uhci_urb_dequeue cef337a0 uhci->state: 2 e400 # ... and then more giveback calls. After this procedure set_next_interrupt, triggered with cat, does still not work. It looks like some enumeration related URB does not complete, it times out, it gets dequeued, I see continuous giveback calls, etc. So the reconnect does not fix the malfunction. The uhci_irq call seen in the first line of the above trace is the only one I can provoke. It occurres every time I replug the device. Axel. ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
