linux-kernel - [PATCH] belkin_sa: clean up for new style termios and speed handling, plus style

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Message-ID: <20071119151851.5cb59add@the-village.bc.nu>
Date:	Mon, 19 Nov 2007 15:18:51 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net
Subject: [PATCH] belkin_sa: clean up for new style termios and speed
 handling, plus style

A tester with actual hardware would be useful

Signed-off-by: Alan Cox <alan@...hat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.24-rc2-mm1/drivers/usb/serial/belkin_sa.c linux-2.6.24-rc2-mm1/drivers/usb/serial/belkin_sa.c
--- linux.vanilla-2.6.24-rc2-mm1/drivers/usb/serial/belkin_sa.c	2007-11-16 17:20:48.000000000 +0000
+++ linux-2.6.24-rc2-mm1/drivers/usb/serial/belkin_sa.c	2007-11-16 18:35:53.000000000 +0000
@@ -350,14 +350,12 @@
 	unsigned long control_state;
 	int bad_flow_control;
 	speed_t baud;
+	struct ktermios *termios = port->tty->termios;
 	
-	if ((!port->tty) || (!port->tty->termios)) {
-		dbg ("%s - no tty or termios structure", __FUNCTION__);
-		return;
-	}
-
-	iflag = port->tty->termios->c_iflag;
-	cflag = port->tty->termios->c_cflag;
+	iflag = termios->c_iflag;
+	cflag = termios->c_cflag;
+	
+	termios->c_cflag &= ~CMSPAR;
 
 	/* get a local copy of the current port settings */
 	spin_lock_irqsave(&priv->lock, flags);
@@ -369,33 +367,30 @@
 	old_cflag = old_termios->c_cflag;
 
 	/* Set the baud rate */
-	if( (cflag&CBAUD) != (old_cflag&CBAUD) ) {
+	if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
 		/* reassert DTR and (maybe) RTS on transition from B0 */
 		if( (old_cflag&CBAUD) == B0 ) {
 			control_state |= (TIOCM_DTR|TIOCM_RTS);
 			if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0)
 				err("Set DTR error");
 			/* don't set RTS if using hardware flow control */
-			if (!(old_cflag&CRTSCTS) )
+			if (!(old_cflag & CRTSCTS))
 				if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 1) < 0)
 					err("Set RTS error");
 		}
 	}
 
 	baud = tty_get_baud_rate(port->tty);
-	if (baud == 0) {
-		dbg("%s - tty_get_baud_rate says 0 baud", __FUNCTION__);
-		return;
-	}
-	urb_value = BELKIN_SA_BAUD(baud);
-	/* Clip to maximum speed */
-	if (urb_value == 0)
-		urb_value = 1;
-	/* Turn it back into a resulting real baud rate */
-	baud = BELKIN_SA_BAUD(urb_value);
-	/* FIXME: Once the tty updates are done then push this back to the tty */
-
-	if ((cflag & CBAUD) != B0 ) {
+	if (baud) {
+		urb_value = BELKIN_SA_BAUD(baud);
+		/* Clip to maximum speed */
+		if (urb_value == 0)
+			urb_value = 1;
+		/* Turn it back into a resulting real baud rate */
+		baud = BELKIN_SA_BAUD(urb_value);
+	
+		/* Report the actual baud rate back to the caller */
+		tty_encode_baud_rate(port->tty, baud, baud);
 		if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0)
 			err("Set baudrate error");
 	} else {
-
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