timbuart: Fix the termios logic

The driver only handles speeds but it fails to return the current values
for the hardware features it does not support.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 15 insertions, 9 deletions

diff --git a/drivers/serial/timbuart.c b/drivers/serial/timbuart.c
index 30ba3c4cc18..ac9e5d5f742 100644
--- a/drivers/serial/timbuart.c
+++ b/drivers/serial/timbuart.c
@@ -278,7 +278,7 @@ static int get_bindex(int baud)
         int i;
 
         for (i = 0; i < ARRAY_SIZE(baudrates); i++)
-                if (baud == baudrates[i])
+                if (baud <= baudrates[i])
                         return i;
 
         return -1;
@@ -296,14 +296,20 @@ static void timbuart_set_termios(struct uart_port *port,
         bindex = get_bindex(baud);
         dev_dbg(port->dev, "%s - bindex %d\n", __func__, bindex);
 
-        if (bindex < 0) {
-                printk(KERN_ALERT "timbuart: Unsupported baud rate\n");
-        } else {
-                spin_lock_irqsave(&port->lock, flags);
-                iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE);
-                uart_update_timeout(port, termios->c_cflag, baud);
-                spin_unlock_irqrestore(&port->lock, flags);
-        }
+        if (bindex < 0)
+                bindex = 0;
+        baud = baudrates[bindex];
+
+        /* The serial layer calls into this once with old = NULL when setting
+           up initially */
+        if (old)
+                tty_termios_copy_hw(termios, old);
+        tty_termios_encode_baud_rate(termios, baud, baud);
+
+        spin_lock_irqsave(&port->lock, flags);
+        iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE);
+        uart_update_timeout(port, termios->c_cflag, baud);
+        spin_unlock_irqrestore(&port->lock, flags);
 }
 
 static const char *timbuart_type(struct uart_port *port)