From 143d9d961608b737d90a813deaaf91affb41c83c Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 21 Mar 2013 12:36:51 +0100 Subject: [PATCH] USB: serial: add tiocmiwait subdriver operation Add tiocmiwait operation to struct usb_serial_driver. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/usb-serial.c | 15 +++++++++++---- include/linux/usb/serial.h | 1 + 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 0b39d013c505..ada400d6594b 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -402,10 +402,17 @@ static int serial_ioctl(struct tty_struct *tty, dev_dbg(tty->dev, "%s - cmd 0x%.4x\n", __func__, cmd); - if (port->serial->type->ioctl) - retval = port->serial->type->ioctl(tty, cmd, arg); - else - retval = -ENOIOCTLCMD; + switch (cmd) { + case TIOCMIWAIT: + if (port->serial->type->tiocmiwait) + retval = port->serial->type->tiocmiwait(tty, arg); + break; + default: + if (port->serial->type->ioctl) + retval = port->serial->type->ioctl(tty, cmd, arg); + else + retval = -ENOIOCTLCMD; + } return retval; } diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index 3f8f5e3c76d5..9c8b53f80f48 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -272,6 +272,7 @@ struct usb_serial_driver { int (*tiocmget)(struct tty_struct *tty); int (*tiocmset)(struct tty_struct *tty, unsigned int set, unsigned int clear); + int (*tiocmiwait)(struct tty_struct *tty, unsigned long arg); int (*get_icount)(struct tty_struct *tty, struct serial_icounter_struct *icount); /* Called by the tty layer for port level work. There may or may not