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USB: serial: fix interface refcounting

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Make sure the interface is not released before our serial device.

Note that drivers are still not allowed to access the interface in
any way that may interfere with another driver that may have gotten
bound to the same interface after disconnect returns.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-19 09:21:09 +01:00 committed by Greg Kroah-Hartman
parent 5492bf3d56
commit d7971051e4
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/serial/usb-serial.c
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@ -151,6 +151,7 @@ static void destroy_serial(struct kref *kref)
}
}
usb_put_intf(serial->interface);
usb_put_dev(serial->dev);
kfree(serial);
}
@ -620,7 +621,7 @@ static struct usb_serial *create_serial(struct usb_device *dev,
}
serial->dev = usb_get_dev(dev);
serial->type = driver;
serial->interface = interface;
serial->interface = usb_get_intf(interface);
kref_init(&serial->kref);
mutex_init(&serial->disc_mutex);
serial->minor = SERIAL_TTY_NO_MINOR;