From 8b8070d8580c38e15979b2a88f3a4d7b02bd3bde Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 21 Mar 2013 12:37:08 +0100 Subject: [PATCH] USB: io_edgeport: switch to generic TIOCMIWAIT implementation Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 35 +------------------------------- drivers/usb/serial/io_tables.h | 4 ++++ 2 files changed, 5 insertions(+), 34 deletions(-) diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 16ef8f3714d9..ff9a6ef8477f 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -1618,8 +1618,6 @@ static int edge_ioctl(struct tty_struct *tty, struct usb_serial_port *port = tty->driver_data; DEFINE_WAIT(wait); struct edgeport_port *edge_port = usb_get_serial_port_data(port); - struct async_icount cnow; - struct async_icount cprev; dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd); @@ -1631,37 +1629,6 @@ static int edge_ioctl(struct tty_struct *tty, case TIOCGSERIAL: dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__, port->number); return get_serial_info(edge_port, (struct serial_struct __user *) arg); - - case TIOCMIWAIT: - dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__, port->number); - cprev = port->icount; - while (1) { - prepare_to_wait(&port->delta_msr_wait, - &wait, TASK_INTERRUPTIBLE); - schedule(); - finish_wait(&port->delta_msr_wait, &wait); - /* see if a signal did it */ - if (signal_pending(current)) - return -ERESTARTSYS; - - if (port->serial->disconnected) - return -EIO; - - cnow = port->icount; - if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && - cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) - return -EIO; /* no change => error */ - if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || - ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || - ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || - ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { - return 0; - } - cprev = cnow; - } - /* NOTREACHED */ - break; - } return -ENOIOCTLCMD; } @@ -2022,7 +1989,7 @@ static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) icount->dcd++; if (newMsr & EDGEPORT_MSR_DELTA_RI) icount->rng++; - wake_up_interruptible(&edge_port->port->delta_msr_wait); + wake_up_interruptible(&edge_port->port->port.delta_msr_wait); } /* Save the new modem status */ diff --git a/drivers/usb/serial/io_tables.h b/drivers/usb/serial/io_tables.h index 35fe9ad7d3da..ae5fac5656c9 100644 --- a/drivers/usb/serial/io_tables.h +++ b/drivers/usb/serial/io_tables.h @@ -116,6 +116,7 @@ static struct usb_serial_driver edgeport_2port_device = { .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, .get_icount = usb_serial_generic_get_icount, .write = edge_write, .write_room = edge_write_room, @@ -147,6 +148,7 @@ static struct usb_serial_driver edgeport_4port_device = { .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, .get_icount = usb_serial_generic_get_icount, .write = edge_write, .write_room = edge_write_room, @@ -178,6 +180,7 @@ static struct usb_serial_driver edgeport_8port_device = { .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, .get_icount = usb_serial_generic_get_icount, .write = edge_write, .write_room = edge_write_room, @@ -209,6 +212,7 @@ static struct usb_serial_driver epic_device = { .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, .get_icount = usb_serial_generic_get_icount, .write = edge_write, .write_room = edge_write_room, -- 2.20.1