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Panda: add check for connected in usb_read (#19957)

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Dean Lee
2021-01-29 20:00:49 +08:00
committed by GitHub
parent 1a95127b0e
commit c723bbd6be
1 changed files with 4 additions and 0 deletions
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selfdrive/boardd/panda.cc
+4
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@@ -118,6 +118,10 @@ int Panda::usb_read(uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned
int err;
const uint8_t bmRequestType = LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE;
if (!connected){
return LIBUSB_ERROR_NO_DEVICE;
}
std::lock_guard lk(usb_lock);
do {
err = libusb_control_transfer(dev_handle, bmRequestType, bRequest, wValue, wIndex, data, wLength, timeout);