diff options
Diffstat (limited to 'drivers/char/mxser.c')
| -rw-r--r-- | drivers/char/mxser.c | 62 |
1 files changed, 35 insertions, 27 deletions
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c index 9d243de795d..463df27494b 100644 --- a/drivers/char/mxser.c +++ b/drivers/char/mxser.c @@ -1700,7 +1700,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, return 0; } - if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && + if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && test_bit(TTY_IO_ERROR, &tty->flags)) return -EIO; @@ -1730,32 +1730,6 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, return wait_event_interruptible(info->port.delta_msr_wait, mxser_cflags_changed(info, arg, &cnow)); - /* - * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) - * Return: write counters to the user passed counter struct - * NB: both 1->0 and 0->1 transitions are counted except for - * RI where only 0->1 is counted. - */ - case TIOCGICOUNT: { - struct serial_icounter_struct icnt = { 0 }; - spin_lock_irqsave(&info->slock, flags); - cnow = info->icount; - spin_unlock_irqrestore(&info->slock, flags); - - icnt.frame = cnow.frame; - icnt.brk = cnow.brk; - icnt.overrun = cnow.overrun; - icnt.buf_overrun = cnow.buf_overrun; - icnt.parity = cnow.parity; - icnt.rx = cnow.rx; - icnt.tx = cnow.tx; - icnt.cts = cnow.cts; - icnt.dsr = cnow.dsr; - icnt.rng = cnow.rng; - icnt.dcd = cnow.dcd; - - return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0; - } case MOXA_HighSpeedOn: return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); case MOXA_SDS_RSTICOUNTER: @@ -1828,6 +1802,39 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, return 0; } + /* + * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) + * Return: write counters to the user passed counter struct + * NB: both 1->0 and 0->1 transitions are counted except for + * RI where only 0->1 is counted. + */ + +static int mxser_get_icount(struct tty_struct *tty, + struct serial_icounter_struct *icount) + +{ + struct mxser_port *info = tty->driver_data; + struct async_icount cnow; + unsigned long flags; + + spin_lock_irqsave(&info->slock, flags); + cnow = info->icount; + spin_unlock_irqrestore(&info->slock, flags); + + icount->frame = cnow.frame; + icount->brk = cnow.brk; + icount->overrun = cnow.overrun; + icount->buf_overrun = cnow.buf_overrun; + icount->parity = cnow.parity; + icount->rx = cnow.rx; + icount->tx = cnow.tx; + icount->cts = cnow.cts; + icount->dsr = cnow.dsr; + icount->rng = cnow.rng; + icount->dcd = cnow.dcd; + return 0; +} + static void mxser_stoprx(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; @@ -2326,6 +2333,7 @@ static const struct tty_operations mxser_ops = { .wait_until_sent = mxser_wait_until_sent, .tiocmget = mxser_tiocmget, .tiocmset = mxser_tiocmset, + .get_icount = mxser_get_icount, }; struct tty_port_operations mxser_port_ops = { |