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USB: spcp8x5: remove broken TIOCMIWAIT support 

Remove broken TIOCMIWAIT support.

This drivers appears to implement TIOCMIWAIT but has no means of
receiving modem-status interrupts.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-21 12:37:24 +01:00 committed by Greg Kroah-Hartman
parent b59597047a
commit f65f9a50dd
1 changed files with 0 additions and 68 deletions
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68
drivers/usb/serial/spcp8x5.c
View File

@ -472,8 +472,6 @@ static void spcp8x5_process_read_urb(struct urb *urb)
status = priv->line_status;
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
/* wake up the wait for termios */
wake_up_interruptible(&port->delta_msr_wait);
if (!urb->actual_length)
return;
@ -509,71 +507,6 @@ static void spcp8x5_process_read_urb(struct urb *urb)
tty_flip_buffer_push(&port->port);
}
static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
unsigned int arg)
{
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned int prevstatus;
unsigned int status;
unsigned int changed;
spin_lock_irqsave(&priv->lock, flags);
prevstatus = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
while (1) {
/* wake up in bulk read */
interruptible_sleep_on(&port->delta_msr_wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
if (port->serial->disconnected)
return -EIO;
spin_lock_irqsave(&priv->lock, flags);
status = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
changed = prevstatus^status;
if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
((arg & TIOCM_CD) && (changed & MSR_STATUS_LINE_DCD)) ||
((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
return 0;
prevstatus = status;
}
/* NOTREACHED */
return 0;
}
static int spcp8x5_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
dev_dbg(&port->dev, "%s (%d) cmd = 0x%04x\n", __func__,
port->number, cmd);
switch (cmd) {
case TIOCMIWAIT:
dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__,
port->number);
return spcp8x5_wait_modem_info(port, arg);
default:
dev_dbg(&port->dev, "%s not supported = 0x%04x", __func__,
cmd);
break;
}
return -ENOIOCTLCMD;
}
static int spcp8x5_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
@ -634,7 +567,6 @@ static struct usb_serial_driver spcp8x5_device = {
.carrier_raised = spcp8x5_carrier_raised,
.set_termios = spcp8x5_set_termios,
.init_termios = spcp8x5_init_termios,
.ioctl = spcp8x5_ioctl,
.tiocmget = spcp8x5_tiocmget,
.tiocmset = spcp8x5_tiocmset,
.port_probe = spcp8x5_port_probe,