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-rw-r--r--drivers/usb/serial/io_ti.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 75325c2b295e..17720670e06c 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2590,6 +2590,10 @@ static int edge_port_probe(struct usb_serial_port *port)
if (ret)
goto err;
+ /*
+ * The LSR does not tell when the transmitter shift register has
+ * emptied so add a one-character drain delay.
+ */
port->port.drain_delay = 1;
return 0;