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USB: mos7840: fix broken TIOCMIWAIT 

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.

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 09:21:19 +01:00 committed by Greg Kroah-Hartman
parent cf1d244436
commit e670c6af12
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/serial/mos7840.c
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@ -423,6 +423,9 @@ static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
icount->rng++;
smp_wmb();
}
mos7840_port->delta_msr_cond = 1;
wake_up_interruptible(&mos7840_port->delta_msr_wait);
}
}
@ -2017,8 +2020,6 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
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);
}