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| author | Johan Hovold <jhovold@gmail.com> | 2013-03-21 12:36:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-25 21:50:52 +0100 |
| commit | 7caed7e78c14e53479fea75c132d297257a2423c (patch) | |
| tree | d85646a64b251d001732da3be1dc1102d32cc176 /drivers/usb/serial/ark3116.c | |
| parent | USB: ark3116: switch to generic get_icount implementation (diff) | |
| download | linux-7caed7e78c14e53479fea75c132d297257a2423c.tar.xz linux-7caed7e78c14e53479fea75c132d297257a2423c.zip | |
USB: ark3116: switch to generic TIOCMIWAIT implementation
Switch to the generic TIOCMIWAIT implementation which does not suffer
from the races involved when using the deprecated sleep_on functions.
This also fixes the issue with processes waiting for
modem-status-changes not being woken up at disconnect.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/ark3116.c')
| -rw-r--r-- | drivers/usb/serial/ark3116.c | 30 |
1 files changed, 2 insertions, 28 deletions
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c index ed3f6b884073..3b16118cbf62 100644 --- a/drivers/usb/serial/ark3116.c +++ b/drivers/usb/serial/ark3116.c @@ -426,33 +426,6 @@ static int ark3116_ioctl(struct tty_struct *tty, if (copy_from_user(&serstruct, user_arg, sizeof(serstruct))) return -EFAULT; return 0; - case TIOCMIWAIT: - for (;;) { - struct async_icount prev = port->icount; - 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; - - if ((prev.rng == port->icount.rng) && - (prev.dsr == port->icount.dsr) && - (prev.dcd == port->icount.dcd) && - (prev.cts == port->icount.cts)) - return -EIO; - if ((arg & TIOCM_RNG && - (prev.rng != port->icount.rng)) || - (arg & TIOCM_DSR && - (prev.dsr != port->icount.dsr)) || - (arg & TIOCM_CD && - (prev.dcd != port->icount.dcd)) || - (arg & TIOCM_CTS && - (prev.cts != port->icount.cts))) - return 0; - } - break; } return -ENOIOCTLCMD; @@ -557,7 +530,7 @@ static void ark3116_update_msr(struct usb_serial_port *port, __u8 msr) port->icount.dcd++; if (msr & UART_MSR_TERI) port->icount.rng++; - wake_up_interruptible(&port->delta_msr_wait); + wake_up_interruptible(&port->port.delta_msr_wait); } } @@ -697,6 +670,7 @@ static struct usb_serial_driver ark3116_device = { .ioctl = ark3116_ioctl, .tiocmget = ark3116_tiocmget, .tiocmset = ark3116_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, .get_icount = usb_serial_generic_get_icount, .open = ark3116_open, .close = ark3116_close, |