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USB: mos7840.c: turn this into a serial driver 

The MOS driver is "interesting", in a bad kind of 'how the hell did this
get merged' kind of way

- Remove the bogus termios change check
- Remove the duplicate code for half the ioctls
- Remove the supporting code to duplicate the ioctl code

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2007-07-09 12:03:10 -07:00 committed by Greg Kroah-Hartman
parent 70f458f668
commit 31473aae5a
1 changed files with 0 additions and 72 deletions
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72
drivers/usb/serial/mos7840.c
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@ -2189,16 +2189,6 @@ static void mos7840_set_termios(struct usb_serial_port *port,
return;
}
/* check that they really want us to change something */
if (old_termios) {
if ((cflag == old_termios->c_cflag) &&
(RELEVANT_IFLAG(tty->termios->c_iflag) ==
RELEVANT_IFLAG(old_termios->c_iflag))) {
dbg("%s\n", "Nothing to change");
return;
}
}
dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
@ -2257,30 +2247,6 @@ static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
return 0;
}
/*****************************************************************************
* mos7840_get_bytes_avail - get number of bytes available
*
* Purpose: Let user call ioctl to get the count of number of bytes available.
*****************************************************************************/
static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
unsigned int __user *value)
{
unsigned int result = 0;
struct tty_struct *tty = mos7840_port->port->tty;
if (!tty)
return -ENOIOCTLCMD;
result = tty->read_cnt;
dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
if (copy_to_user(value, &result, sizeof(int)))
return -EFAULT;
return -ENOIOCTLCMD;
}
/*****************************************************************************
* mos7840_set_modem_info
* function to set modem info
@ -2429,8 +2395,6 @@ static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
struct async_icount cprev;
struct serial_icounter_struct icount;
int mosret = 0;
int retval;
struct tty_ldisc *ld;
if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
dbg("%s", "Invalid port \n");
@ -2449,42 +2413,6 @@ static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
switch (cmd) {
/* return number of bytes available */
case TIOCINQ:
dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
return mos7840_get_bytes_avail(mos7840_port, argp);
case TIOCOUTQ:
dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
return put_user(tty->driver->chars_in_buffer ?
tty->driver->chars_in_buffer(tty) : 0,
(int __user *)arg);
case TCFLSH:
retval = tty_check_change(tty);
if (retval)
return retval;
ld = tty_ldisc_ref(tty);
switch (arg) {
case TCIFLUSH:
if (ld && ld->flush_buffer)
ld->flush_buffer(tty);
break;
case TCIOFLUSH:
if (ld && ld->flush_buffer)
ld->flush_buffer(tty);
/* fall through */
case TCOFLUSH:
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
break;
default:
tty_ldisc_deref(ld);
return -EINVAL;
}
tty_ldisc_deref(ld);
return 0;
case TIOCSERGETLSR:
dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
return mos7840_get_lsr_info(mos7840_port, argp);