isicom: restore using hardware break support

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 21 deletions

diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index d4281df10c22..8f7cc190b62d 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -1181,14 +1181,17 @@ static int isicom_chars_in_buffer(struct tty_struct *tty)
 }
 
 /* ioctl et all */
-static inline void isicom_send_break(struct isi_port *port,
-        unsigned long length)
+static int isicom_send_break(struct tty_struct *tty, int length)
 {
+        struct isi_port *port = tty->driver_data;
         struct isi_board *card = port->card;
         unsigned long base = card->base;
 
+        if (length == -1)
+                return -EOPNOTSUPP;
+
         if (!lock_card(card))
-                return;
+                return -EINVAL;
 
         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
         outw((length & 0xff) << 8 | 0x00, base);
@@ -1196,6 +1199,7 @@ static inline void isicom_send_break(struct isi_port *port,
         InterruptTheCard(base);
 
         unlock_card(card);
+        return 0;
 }
 
 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
@@ -1305,28 +1309,11 @@ static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
 {
         struct isi_port *port = tty->driver_data;
         void __user *argp = (void __user *)arg;
-        int retval;
 
         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
                 return -ENODEV;
 
         switch (cmd) {
-        case TCSBRK:
-                retval = tty_check_change(tty);
-                if (retval)
-                        return retval;
-                tty_wait_until_sent(tty, 0);
-                if (!arg)
-                        isicom_send_break(port, HZ/4);
-                return 0;
-
-        case TCSBRKP:
-                retval = tty_check_change(tty);
-                if (retval)
-                        return retval;
-                tty_wait_until_sent(tty, 0);
-                isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
-                return 0;
         case TIOCGSERIAL:
                 return isicom_get_serial_info(port, argp);
 
@@ -1459,6 +1446,7 @@ static const struct tty_operations isicom_ops = {
         .flush_buffer           = isicom_flush_buffer,
         .tiocmget               = isicom_tiocmget,
         .tiocmset               = isicom_tiocmset,
+        .break_ctl              = isicom_send_break,
 };
 
 static int __devinit reset_card(struct pci_dev *pdev,
@@ -1832,7 +1820,7 @@ static int __init isicom_init(void)
         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
                 CLOCAL;
         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
-                TTY_DRIVER_DYNAMIC_DEV;
+                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
         tty_set_operations(isicom_normal, &isicom_ops);
 
         retval = tty_register_driver(isicom_normal);