From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 3 Jan 2008 16:57:33 +0000 (+0000)
Subject: USB: io_ti: clean up termios handling
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d5f5bcd425b771c0b7ff5a650b2ce061ac8bbb87;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

USB: io_ti: clean up termios handling

Don't pass NULL into termios functions when calling them internally
Remove all the crap which then checks for NULL which can't occur now
Clear CMSPAR as it is not supported
Report the baud rate back to the caller properly (See FIXME someone with
the docs)

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index f7fdf1ce6bf3..cd3405953f74 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -1979,7 +1979,7 @@ static int edge_open (struct usb_serial_port *port, struct file * filp)
 	}
 	
 	/* set up the port settings */
-	edge_set_termios (port, NULL);
+	edge_set_termios (port, port->tty->termios);
 
 	/* open up the port */
 
@@ -2394,11 +2394,6 @@ static void change_port_settings (struct edgeport_port *edge_port, struct ktermi
 	dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
 
 	tty = edge_port->port->tty;
-	if ((!tty) ||
-	    (!tty->termios)) {
-		dbg("%s - no tty structures", __FUNCTION__);
-		return;
-	}
 
 	config = kmalloc (sizeof (*config), GFP_KERNEL);
 	if (!config) {
@@ -2493,15 +2488,21 @@ static void change_port_settings (struct edgeport_port *edge_port, struct ktermi
 		}
 	}
 
+	tty->termios->c_cflag &= ~CMSPAR;
+
 	/* Round the baud rate */
 	baud = tty_get_baud_rate(tty);
 	if (!baud) {
 		/* pick a default, any default... */
 		baud = 9600;
-	}
+	} else
+		tty_encode_baud_rate(tty, baud, baud);
+
 	edge_port->baud_rate = baud;
 	config->wBaudRate = (__u16)((461550L + baud/2) / baud);
 
+	/* FIXME: Recompute actual baud from divisor here */
+
 	dbg ("%s - baud rate = %d, wBaudRate = %d", __FUNCTION__, baud, config->wBaudRate);
 
 	dbg ("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
@@ -2539,19 +2540,12 @@ static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old
 	struct tty_struct *tty = port->tty;
 	unsigned int cflag;
 
-	if (!port->tty || !port->tty->termios) {
-		dbg ("%s - no tty or termios", __FUNCTION__);
-		return;
-	}
-
 	cflag = tty->termios->c_cflag;
 
 	dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 
 	    tty->termios->c_cflag, tty->termios->c_iflag);
-	if (old_termios) {
-		dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
-		    old_termios->c_cflag, old_termios->c_iflag);
-	}
+	dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
+	    old_termios->c_cflag, old_termios->c_iflag);
 
 	dbg("%s - port %d", __FUNCTION__, port->number);