Dear all: I modified the lddbus sample bus driver in ldd3 as the attach file. 1. I add bus, ldd_bus_type, in ldd_bus. 2. I add device_driver, ldd_bus_driver, in ldd_bus. 3. then call device_register(&ldd_bus) The module can been successfully compiled, but the kernel panic will show while insert the module. (the kernel is dead totally such that I cannot attach the kernel log file. BTW, will someone tell me how to dump this kind of log?) I even try device_add(&ldd_bus), as I marked in the source code but it still fail. This inspiration comes from usb-host contrller driver. ( The usb hub device is allocated and initialized the bus and device_driver by usb_alloc_dev located at core/usb.c. Then it call device_add (&udev->dev) at usb_new_device located at core/hub.c) Could someone tell me where it goes wrong? appreciate your help, vichy
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lddbus.c
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