serial: 8250: Allow probe drivers to ignore tx_loadsz

In most cases the tx_loadsz is the same as fifosize. This
will store the fifosize in it if it was not separately
delivered from the driver.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index cf6a538..19ebbdf 100644 (file)
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -3247,6 +3247,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
                uart->tx_loadsz         = up->tx_loadsz;
                uart->capabilities      = up->capabilities;
 
+               /* Take tx_loadsz from fifosize if it wasn't set separately */
+               if (uart->port.fifosize && !uart->tx_loadsz)
+                       uart->tx_loadsz = uart->port.fifosize;
+
                if (up->port.dev)
                        uart->port.dev = up->port.dev;