tty: Bring the usb tty port structure into more use

This allows us to clean stuff up, but is probably also going to cause
some app breakage with buggy apps as we now implement proper POSIX behaviour
for USB ports matching all the other ports. This does also mean other apps
that break on USB will now work properly.

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 9 deletions

diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
index da2a2b46644a..29ad038b9c8d 100644
--- a/drivers/usb/serial/ipw.c
+++ b/drivers/usb/serial/ipw.c
@@ -302,23 +302,17 @@ static int ipw_open(struct tty_struct *tty,
         return 0;
 }
 
-static void ipw_close(struct tty_struct *tty,
-                        struct usb_serial_port *port, struct file *filp)
+static void ipw_dtr_rts(struct usb_serial_port *port, int on)
 {
         struct usb_device *dev = port->serial->dev;
         int result;
 
-        if (tty_hung_up_p(filp)) {
-                dbg("%s: tty_hung_up_p ...", __func__);
-                return;
-        }
-
         /*--1: drop the dtr */
         dbg("%s:dropping dtr", __func__);
         result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                          IPW_SIO_SET_PIN,
                          USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
-                         IPW_PIN_CLRDTR,
+                         on ? IPW_PIN_SETDTR : IPW_PIN_CLRDTR,
                          0,
                          NULL,
                          0,
@@ -332,7 +326,7 @@ static void ipw_close(struct tty_struct *tty,
         result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                          IPW_SIO_SET_PIN, USB_TYPE_VENDOR |
                                         USB_RECIP_INTERFACE | USB_DIR_OUT,
-                         IPW_PIN_CLRRTS,
+                         on ? IPW_PIN_SETRTS : IPW_PIN_CLRRTS,
                          0,
                          NULL,
                          0,
@@ -340,7 +334,12 @@ static void ipw_close(struct tty_struct *tty,
         if (result < 0)
                 dev_err(&port->dev,
                                 "dropping rts failed (error = %d)\n", result);
+}
 
+static void ipw_close(struct usb_serial_port *port)
+{
+        struct usb_device *dev = port->serial->dev;
+        int result;
 
         /*--3: purge */
         dbg("%s:sending purge", __func__);
@@ -461,6 +460,7 @@ static struct usb_serial_driver ipw_device = {
         .num_ports =            1,
         .open =                 ipw_open,
         .close =                ipw_close,
+        .dtr_rts =              ipw_dtr_rts,
         .port_probe =           ipw_probe,
         .port_remove =          ipw_disconnect,
         .write =                ipw_write,