On Tue, Jun 13, 2017 at 7:02 PM, Tal Shorer <tal.shorer@xxxxxxxxx> wrote: > On Tue, Jun 13, 2017 at 3:21 PM, Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: >> Hi! >> >> I'm trying to use gadgetfs to fuzz USB device drivers by simply >> connecting random devices for now. >> >> What I want to achieve right now is the following: >> >> 1. mount gadgetfs >> 2. emulate connection of a new USB device >> 3. wait for the device to finish initializing >> 4. unmount gadgetfs >> 5. goto 1 >> >> The question is how do I wait for the device to finish initializing >> (the corresponding USB driver to finish probing?) before unmounting >> gadgetfs? As I understand, when I write device description to >> "/dev/gadget/dummy_udc" the initialization happens asynchronously >> after writing is done. >> > > You can use inotify on the state file inside a udc's sysfs directory. > It's awesome like that. > Here's a sample code that doesn't do any cleanups because I'm lazy: > https://gist.github.com/talshorer/61be1bc3472cc2a7b4866b9bd5a239ca And I forgot usage >: ./wait_udc_configured /sys/devices/platform/dummy_udc.0/udc/dummy_udc.0/state -- 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
