diff options
| author | Johan Hovold <jhovold@gmail.com> | 2013-03-21 12:36:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-25 13:50:51 -0700 |
| commit | befefcda4bddc52d29248931801961a72aeef28b (patch) | |
| tree | b8b47011f4321938a599ad8622944d786c33d4f4 /drivers/usb/serial/generic.c | |
| parent | c371de14b9a23aadb57accab0ca2e5dd28de7f16 (diff) | |
USB: serial: add generic get_icount implementation
Add generic get_icount implementation that subdrivers relying on the
port interrupt counters can use.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/generic.c')
| -rw-r--r-- | drivers/usb/serial/generic.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index 18bc74e20fe..5e55761b2cb 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -476,6 +476,33 @@ int usb_serial_generic_tiocmiwait(struct tty_struct *tty, unsigned long arg) } EXPORT_SYMBOL_GPL(usb_serial_generic_tiocmiwait); +int usb_serial_generic_get_icount(struct tty_struct *tty, + struct serial_icounter_struct *icount) +{ + struct usb_serial_port *port = tty->driver_data; + struct async_icount cnow; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + cnow = port->icount; /* atomic copy */ + spin_unlock_irqrestore(&port->lock, flags); + + icount->cts = cnow.cts; + icount->dsr = cnow.dsr; + icount->rng = cnow.rng; + icount->dcd = cnow.dcd; + icount->tx = cnow.tx; + icount->rx = cnow.rx; + icount->frame = cnow.frame; + icount->parity = cnow.parity; + icount->overrun = cnow.overrun; + icount->brk = cnow.brk; + icount->buf_overrun = cnow.buf_overrun; + + return 0; +} +EXPORT_SYMBOL_GPL(usb_serial_generic_get_icount); + #ifdef CONFIG_MAGIC_SYSRQ int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) { |