Merge tag 'usb-serial-4.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-next

Johan writes:

USB-serial updates for v4.19-rc1

Here are the USB-serial updates for 4.19-rc1, including:

 - gpio support for CP2102N devices
 - improved line-speed handling for cp210x
 - conversion to spin_lock_irqsave() in completion handlers
 - dropped kl5kusb105 support from the kl5kusb105 driver (sic!)

Included are also various lower-priority fixes and clean ups.

All but the final commit have been in linux-next, and with no reported
issues.

Signed-off-by: Johan Hovold <johan@kernel.org>

drivers/usb/serial/mos7840.c

@@ -805,18 +805,19 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
 	struct moschip_port *mos7840_port;
 	struct usb_serial_port *port;
 	int status = urb->status;
+	unsigned long flags;
 	int i;
 
 	mos7840_port = urb->context;
 	port = mos7840_port->port;
-	spin_lock(&mos7840_port->pool_lock);
+	spin_lock_irqsave(&mos7840_port->pool_lock, flags);
 	for (i = 0; i < NUM_URBS; i++) {
 		if (urb == mos7840_port->write_urb_pool[i]) {
 			mos7840_port->busy[i] = 0;
 			break;
 		}
 	}
-	spin_unlock(&mos7840_port->pool_lock);
+	spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
 
 	if (status) {
 		dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);