usb.c: Bail out of e1-tracer doesn't accept set_configuration(2)
This likely means it's not an e1-tracer after all, or it's an old firmware that doesn't yet expose the e1d-compatible USB configuration. Related: OS#5734 Change-Id: If5a9bc20084d84885d5d97b4f982e94801612d24
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@ -876,8 +876,13 @@ _e1_usb_open_device(struct e1_daemon *e1d, struct libusb_device *dev, bool is_tr
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}
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/* we have prior knowledge that the e1-tracer firmware configuration 2 is the e1d compatible mode. */
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if (is_tracer)
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libusb_set_configuration(devh, 2);
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if (is_tracer) {
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if (libusb_set_configuration(devh, 2) != LIBUSB_SUCCESS) {
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LOGP(DE1D, LOGL_ERROR, "Cannot set configuration 2 of e1-tracer device. Maybe too old firmware?\n");
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libusb_close(devh);
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return -EIO;
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}
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}
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INIT_LLIST_HEAD(&intf_data->ctrl_inprogress);
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