diff --git a/[refs] b/[refs]
index fed5223c4fba..519fbb14bbd8 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 187226f57f1381cfc63216979b4375f30e593795
+refs/heads/master: 20620d688ac6ff8ea01a873e46febf5a6a7909f1
diff --git a/trunk/drivers/serial/serial_core.c b/trunk/drivers/serial/serial_core.c
index 030a6063541d..a055f58f342f 100644
--- a/trunk/drivers/serial/serial_core.c
+++ b/trunk/drivers/serial/serial_core.c
@@ -1146,11 +1146,14 @@ static void uart_set_termios(struct tty_struct *tty, struct ktermios *old_termio
 
 	/*
 	 * These are the bits that are used to setup various
-	 * flags in the low level driver.
+	 * flags in the low level driver. We can ignore the Bfoo
+	 * bits in c_cflag; c_[io]speed will always be set
+	 * appropriately by set_termios() in tty_ioctl.c
 	 */
 #define RELEVANT_IFLAG(iflag)	((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
 	if ((cflag ^ old_termios->c_cflag) == 0 &&
+	    tty->termios->c_ospeed == old_termios->c_ospeed &&
+	    tty->termios->c_ispeed == old_termios->c_ispeed &&
 	    RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0)
 		return;