add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/tty/isicom.c
..
..
@@ -553,7 +553,6 @@
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 	tty = tty_port_tty_get(&port->port);
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 	if (tty == NULL) {
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-		word_count = byte_count >> 1;
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 		while (byte_count > 1) {
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 			inw(base);
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 			byte_count -= 2;
..
..
@@ -1091,34 +1090,33 @@
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 }
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 static int isicom_set_serial_info(struct tty_struct *tty,
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-					struct serial_struct __user *info)
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+					struct serial_struct *ss)
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 {
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 	struct isi_port *port = tty->driver_data;
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-	struct serial_struct newinfo;
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 	int reconfig_port;
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-	if (copy_from_user(&newinfo, info, sizeof(newinfo)))
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-		return -EFAULT;
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+	if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
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+		return -ENODEV;
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 	mutex_lock(&port->port.mutex);
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 	reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
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-		(newinfo.flags & ASYNC_SPD_MASK));
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+		(ss->flags & ASYNC_SPD_MASK));
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 	if (!capable(CAP_SYS_ADMIN)) {
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-		if ((newinfo.close_delay != port->port.close_delay) ||
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-				(newinfo.closing_wait != port->port.closing_wait) ||
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-				((newinfo.flags & ~ASYNC_USR_MASK) !=
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+		if ((ss->close_delay != port->port.close_delay) ||
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+				(ss->closing_wait != port->port.closing_wait) ||
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+				((ss->flags & ~ASYNC_USR_MASK) !=
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 				(port->port.flags & ~ASYNC_USR_MASK))) {
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 			mutex_unlock(&port->port.mutex);
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 			return -EPERM;
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 		}
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 		port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
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-				(newinfo.flags & ASYNC_USR_MASK));
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+				(ss->flags & ASYNC_USR_MASK));
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 	} else {
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-		port->port.close_delay = newinfo.close_delay;
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-		port->port.closing_wait = newinfo.closing_wait;
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+		port->port.close_delay = ss->close_delay;
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+		port->port.closing_wait = ss->closing_wait;
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 		port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
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-				(newinfo.flags & ASYNC_FLAGS));
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+				(ss->flags & ASYNC_FLAGS));
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 	}
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 	if (reconfig_port) {
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 		unsigned long flags;
..
..
@@ -1130,46 +1128,24 @@
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 	return 0;
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 }
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-static int isicom_get_serial_info(struct isi_port *port,
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-	struct serial_struct __user *info)
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-{
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-	struct serial_struct out_info;
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-
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-	mutex_lock(&port->port.mutex);
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-	memset(&out_info, 0, sizeof(out_info));
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-/*	out_info.type = ? */
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-	out_info.line = port - isi_ports;
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-	out_info.port = port->card->base;
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-	out_info.irq = port->card->irq;
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-	out_info.flags = port->port.flags;
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-/*	out_info.baud_base = ? */
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-	out_info.close_delay = port->port.close_delay;
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-	out_info.closing_wait = port->port.closing_wait;
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-	mutex_unlock(&port->port.mutex);
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-	if (copy_to_user(info, &out_info, sizeof(out_info)))
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-		return -EFAULT;
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-	return 0;
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-}
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-
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-static int isicom_ioctl(struct tty_struct *tty,
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-	unsigned int cmd, unsigned long arg)
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+static int isicom_get_serial_info(struct tty_struct *tty,
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+	struct serial_struct *ss)
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 {
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 	struct isi_port *port = tty->driver_data;
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-	void __user *argp = (void __user *)arg;
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 	if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
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 		return -ENODEV;
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-	switch (cmd) {
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-	case TIOCGSERIAL:
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-		return isicom_get_serial_info(port, argp);
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-
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-	case TIOCSSERIAL:
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-		return isicom_set_serial_info(tty, argp);
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-
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-	default:
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-		return -ENOIOCTLCMD;
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-	}
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+	mutex_lock(&port->port.mutex);
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+/*	ss->type = ? */
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+	ss->line = port - isi_ports;
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+	ss->port = port->card->base;
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+	ss->irq = port->card->irq;
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+	ss->flags = port->port.flags;
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+/*	ss->baud_base = ? */
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+	ss->close_delay = port->port.close_delay;
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+	ss->closing_wait = port->port.closing_wait;
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+	mutex_unlock(&port->port.mutex);
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 	return 0;
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 }
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..
..
@@ -1273,7 +1249,6 @@
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 	.flush_chars		= isicom_flush_chars,
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 	.write_room		= isicom_write_room,
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 	.chars_in_buffer	= isicom_chars_in_buffer,
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-	.ioctl			= isicom_ioctl,
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 	.set_termios		= isicom_set_termios,
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 	.throttle		= isicom_throttle,
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 	.unthrottle		= isicom_unthrottle,
..
..
@@ -1284,6 +1259,8 @@
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 	.tiocmget		= isicom_tiocmget,
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 	.tiocmset		= isicom_tiocmset,
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 	.break_ctl		= isicom_send_break,
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+	.get_serial		= isicom_get_serial_info,
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+	.set_serial		= isicom_set_serial_info,
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 };
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 static const struct tty_port_operations isicom_port_ops = {
..
..
@@ -1537,7 +1514,7 @@
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 static int isicom_probe(struct pci_dev *pdev,
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 	const struct pci_device_id *ent)
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 {
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-	unsigned int uninitialized_var(signature), index;
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+	unsigned int signature, index;
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 	int retval = -EPERM;
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 	struct isi_board *board = NULL;
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