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Add retry w/ timeout around LIBUSB_ERROR_ACCESS #229

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Add retry w/ timeout around LIBUSB_ERROR_ACCESS #229

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23 changes: 20 additions & 3 deletions transports/libhoth_usb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -193,9 +193,26 @@ static int libhoth_usb_device_open(
usb_dev->info = info;
usb_dev->ctx = options->usb_ctx;
usb_dev->claim_timeout_us = options->timeout_us;
status = libusb_open(options->usb_device, &usb_dev->handle);
if (status != LIBUSB_SUCCESS) {
goto err_out;

uint32_t wait_time_us = 0;
while (true) {
status = libusb_open(options->usb_device, &usb_dev->handle);

if (status == LIBUSB_SUCCESS) {
break;
}

if (status != LIBUSB_ERROR_ACCESS) {
goto err_out;
}

if (wait_time_us >= options->timeout_us) {
// timeout
goto err_out;
}

usleep(1000);
wait_time_us += 1000;
}

dev->send = libhoth_usb_send_request;
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