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USB: gadget: Hangup tty on g_serial disconnect

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On USB cable disconnect g_serial doesn't hangup the port tty,
which results in an endless read on the tty device. With the
following patch the read and select behave correctly when
the cable is unplugged.

Tested on at91rm9200

Signed-off-by: Savin Zlobec <savin@epiko.si>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Savin Zlobec 2008-02-15 13:42:01 +01:00 committed by Greg Kroah-Hartman
parent c765d4cad9
commit 4208978ec4
1 changed files with 1 additions and 2 deletions
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3
drivers/usb/gadget/serial.c
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@ -2163,8 +2163,7 @@ static void gs_free_ports(struct gs_dev *dev)
port->port_dev = NULL;
wake_up_interruptible(&port->port_write_wait);
if (port->port_tty) {
wake_up_interruptible(&port->port_tty->read_wait);
wake_up_interruptible(&port->port_tty->write_wait);
tty_hangup(port->port_tty);
}
spin_unlock_irqrestore(&port->port_lock, flags);
} else {