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Subject[ 062/124] USB: mos7840: fix broken TIOCMIWAIT
Date
3.8-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>
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
@@ -423,6 +423,9 @@ 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);
}
}

@@ -2021,8 +2024,6 @@ 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;
dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
mos7840_port->shadowLCR);
}



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