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Groups > linux.kernel > #1664997
| From | Tal Shorer <tal.shorer@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: gadgetfs: how to wait for USB device initialization? |
| Date | 2017-06-13 18:30 +0200 |
| Message-ID | <tRWRA-1MW-15@gated-at.bofh.it> (permalink) |
| References | <tRT7k-7UN-27@gated-at.bofh.it> <tRWyd-1GR-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Jun 13, 2017 at 7:02 PM, Tal Shorer <tal.shorer@gmail.com> wrote: > On Tue, Jun 13, 2017 at 3:21 PM, Andrey Konovalov <andreyknvl@google.com> 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
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gadgetfs: how to wait for USB device initialization? Andrey Konovalov <andreyknvl@google.com> - 2017-06-13 14:30 +0200
Re: gadgetfs: how to wait for USB device initialization? Alan Stern <stern@rowland.harvard.edu> - 2017-06-13 16:50 +0200
Re: gadgetfs: how to wait for USB device initialization? Tal Shorer <tal.shorer@gmail.com> - 2017-06-13 18:10 +0200
Re: gadgetfs: how to wait for USB device initialization? Tal Shorer <tal.shorer@gmail.com> - 2017-06-13 18:30 +0200
Re: gadgetfs: how to wait for USB device initialization? Andrey Konovalov <andreyknvl@google.com> - 2017-06-13 20:10 +0200
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