tty: Char: mxser, use THRE for ASPP_OQUEUE ioctl

In moxa specific ASPP_OQUEUE ioctl command, they apparently want
only know whether there is space in transmitter hold register.

So switch UART_LSR_TEMT to UART_LSR_THRE in that specific case
according to the change in 1.14 moxa drivers.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index e218ae2..5e28d39 100644 (file)
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1806,7 +1806,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
 
                lock_kernel();
                len = mxser_chars_in_buffer(tty);
-               lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
+               lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
                len += (lsr ? 0 : 1);
                unlock_kernel();