From f29e37c076cd08004e31297d205d54ac38cf7a20 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 7 Feb 2008 00:16:41 -0800
Subject: mxser/mxser_new: first pass over termios reporting for the mxser
 cards

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/char/mxser.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

(limited to 'drivers/char/mxser.c')

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 5d790109604..35ff7a24554 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1391,7 +1391,8 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int c
 			long baud;
 			if (get_user(baud, (long __user *)argp))
 				return -EFAULT;
-			mxser_set_baud(info, baud);
+			if (mxser_set_baud(info, baud) == -1)
+				return -1;
 			return 0;
 		}
 	case MOXA_ASPP_GETBAUD:
@@ -2517,7 +2518,13 @@ static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_te
 #endif
 	if (mxser_set_baud_method[info->port] == 0) {
 		baud = tty_get_baud_rate(info->tty);
-		mxser_set_baud(info, baud);
+		if (mxser_set_baud(info, baud) == -1) {
+			/* Use previous rate on a failure */
+			if (old_termios) {
+				baud = tty_termios_baud_rate(old_termios);
+				tty_encode_baud_rate(info->tty, baud, baud);
+			}
+		}
 	}
 
 	/* byte size and parity */
@@ -2691,27 +2698,31 @@ static int mxser_set_baud(struct mxser_struct *info, long newspd)
 {
 	int quot = 0;
 	unsigned char cval;
-	int ret = 0;
 	unsigned long flags;
+	unsigned int baud;
 
 	if (!info->tty || !info->tty->termios)
-		return ret;
+		return -1;
 
 	if (!(info->base))
-		return ret;
+		return -1;
 
 	if (newspd > info->MaxCanSetBaudRate)
-		return 0;
+		return -1;
 
 	info->realbaud = newspd;
 	if (newspd == 134) {
 		quot = (2 * info->baud_base / 269);
+		tty_encode_baud_rate(info->tty, 134, 134);
 	} else if (newspd) {
 		quot = info->baud_base / newspd;
 		if (quot == 0)
 			quot = 1;
+		baud = info->baud_base / quot;
+		tty_encode_baud_rate(info->tty, baud, baud);
 	} else {
 		quot = 0;
+		tty_encode_baud_rate(info->tty, 0, 0);
 	}
 
 	info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
@@ -2727,7 +2738,7 @@ static int mxser_set_baud(struct mxser_struct *info, long newspd)
 		info->MCR &= ~UART_MCR_DTR;
 		outb(info->MCR, info->base + UART_MCR);
 		spin_unlock_irqrestore(&info->slock, flags);
-		return ret;
+		return 0;
 	}
 
 	cval = inb(info->base + UART_LCR);
@@ -2739,7 +2750,7 @@ static int mxser_set_baud(struct mxser_struct *info, long newspd)
 	outb(cval, info->base + UART_LCR);	/* reset DLAB */
 
 
-	return ret;
+	return 0;
 }
 
 /*
-- 
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