Correct ftdi_poll_modem_status() result code

[libftdi] / src / ftdi.c

diff --git a/src/ftdi.c b/src/ftdi.c
index c7856a4..c53d7aa 100644 (file)
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -1984,7 +1984,7 @@ int ftdi_poll_modem_status(struct ftdi_context *ftdi, unsigned short *status)
     if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_POLL_MODEM_STATUS_REQUEST, 0, ftdi->index, (unsigned char *)usb_val, 2, ftdi->usb_read_timeout) != 2)
         ftdi_error_return(-1, "getting modem status failed");
 
-    *status = (usb_val[1] << 8) | usb_val[0];
+    *status = (usb_val[1] << 8) | (usb_val[0] & 0xFF);
 
     return 0;
 }