I'm in trouble to get some usb(4) devices working here. Devices are attached as ugen(4) and are driven by userspace (libusb) drivers/daemons. As far as I can see what happens is that daemon opens ugen(4) device correctly and starts to poll(2) interrupt endpoint of the device (devices have single interface). The trouble is that poll(2) seems to ignore timeout. It doesn't return until there is data available in the descriptor. Ie I can make poll(2) to return with poking device, but till then it blocks. Before I dig deep into areas I'm not familiar with ... Any ideas why and where it might happen? Anyone seen something like this? -- Hasso Tepper
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