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Commit e670c6af authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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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: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cf1d2444

drivers/usb/serial/mos7840.c

+3 −2
Original line number Diff line number Diff line
@@ -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);

}