3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Ming Lei <tom.leim...@gmail.com> commit eba0e3c3a0ba7b96f01cbe997680f6a4401a0bfc upstream. Johan's 'fix use-after-free in TIOCMIWAIT' patchset[1] introduces one bug which can cause kernel hang when opening port. This patch initialized the 'port->delta_msr_wait' waitqueue head to fix the bug which is introduced in 3.9-rc4. [1], http://marc.info/?l=linux-usb&m=136368139627876&w=2 Signed-off-by: Ming Lei <tom.leim...@gmail.com> Acked-by: Johan Hovold <jhov...@gmail.com> Signed-off-by: Ben Hutchings <b...@decadent.org.uk> Cc: Yang Yingliang <yangyingli...@huawei.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/usb/serial/usb-serial.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -908,6 +908,7 @@ int usb_serial_probe(struct usb_interfac port->port.ops = &serial_port_ops; port->serial = serial; spin_lock_init(&port->lock); + init_waitqueue_head(&port->delta_msr_wait); /* Keep this for private driver use for the moment but should probably go away */ INIT_WORK(&port->work, usb_serial_port_work); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
