| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.4 065/134] USB: mos7840: fix broken TIOCMIWAIT | Date | Wed, 9 Apr 2014 20:23:01 -0700 |
| |
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <jhovold@gmail.com>
commit e670c6af12517d08a403487b1122eecf506021cf upstream.
Make sure waiting processes are woken on modem-status changes.
Currently processes are only woken on termios changes regardless of whether the modem status has changed.
Signed-off-by: Johan Hovold <jhovold@gmail.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/serial/mos7840.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -453,6 +453,9 @@ static void mos7840_handle_new_msr(struc icount->rng++; smp_wmb(); } + + mos7840_port->delta_msr_cond = 1; + wake_up_interruptible(&mos7840_port->delta_msr_wait); } } @@ -2074,8 +2077,6 @@ static void mos7840_change_port_settings mos7840_port->read_urb_busy = false; } } - wake_up(&mos7840_port->delta_msr_wait); - mos7840_port->delta_msr_cond = 1; dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", mos7840_port->shadowLCR); }
|