USB: kl5kusb105 don't flush to logically disconnected devices (3edbc986) · Commits · 戴 / test

If disconnect() is called for a logical disconnect, no more IO must be done after disconnect() returns, or the old and new drivers may conflict. This patch avoids this by using the flag and lock introduced by the earlier patch for the mos7720 driver. Signed-off-by:

Oliver Neukum <oneukum@suse.de> Signed-off-by:

Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/kl5kusb105.c

+15 −11

Original line number	Diff line number	Diff line
		@@ -461,6 +461,8 @@ static void klsi_105_close (struct usb_serial_port port, struct file filp)

		dbg("%s port %d", __FUNCTION__, port->number);

		mutex_lock(&port->serial->disc_mutex);
		if (!port->serial->disconnected) {
		/* send READ_OFF */
		rc = usb_control_msg (port->serial->dev,
		usb_sndctrlpipe(port->serial->dev, 0),
		@@ -472,6 +474,8 @@ static void klsi_105_close (struct usb_serial_port port, struct file filp)
		KLSI_TIMEOUT);
		if (rc < 0)
		err("Disabling read failed (error = %d)", rc);
		}
		mutex_unlock(&port->serial->disc_mutex);

		/* shutdown our bulk reads and writes */
		usb_kill_urb(port->write_urb);

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