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    SubjectRe: 2.6.21-rc6-mm1 USB related boot hang
    On Thu, 12 Apr 2007, Helge Hafting wrote:

    > The last messages (handwritten, somewhat shortened)
    > calling hid_init+0x0/0x10()
    > returned 0
    > ran for 0 msec
    > calling hid_init+0x0/0x50()
    > usbcore registered new interface driver hiddev
    > and then it hangs completely.

    OK, so it hangs somewhere nearby usbhid's hid_init(), and the
    usb_register() has been already invoked. Could you please apply the
    superstupid patch below and send me the output up to the point it hangs? I
    am curious to know whether it hangs somewhere inside usb_register(), or
    elsewhere.

    Thanks.

    diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
    index 1ddca31..d930f62 100644
    --- a/drivers/hid/usbhid/hid-core.c
    +++ b/drivers/hid/usbhid/hid-core.c
    @@ -1550,15 +1550,22 @@ static int __init hid_init(void)
    retval = hiddev_init();
    if (retval)
    goto hiddev_init_fail;
    + printk(KERN_DEBUG "hid_init: before usb_register()\n");
    retval = usb_register(&hid_driver);
    + printk(KERN_DEBUG "hid_init: after usb_register(), retuned %d\n", retval);
    if (retval)
    goto usb_register_fail;
    info(DRIVER_VERSION ":" DRIVER_DESC);

    + printk(KERN_DEBUG "hid_init: returning 0\n");
    + dump_stack();
    return 0;
    usb_register_fail:
    + printk(KERN_DEBUG "hid_init: calling hiddev_exit()\n");
    hiddev_exit();
    hiddev_init_fail:
    + printk(KERN_DEBUG "hid_init: returning %d\n", retval);
    + dump_stack();
    return retval;
    }

    -
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      Last update: 2007-04-12 20:37    [W:0.020 / U:0.560 seconds]
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