staging: comedi: s626: clarify COMEDI_CB_EOA code

The end-of-acquisition only applies when the cmd->stop_src == TRIG_COUNT.

Refactor the code in s626_handle_eos_interrupt() that detects the end-of-
acquisition to clarify this.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/s626.c

@@ -1501,7 +1501,7 @@ static bool s626_handle_eos_interrupt(struct comedi_device *dev)
 	/* end of scan occurs */
 	async->events |= COMEDI_CB_EOS;
 
-	if (cmd->stop_src == TRIG_COUNT)
+	if (cmd->stop_src == TRIG_COUNT) {
 		devpriv->ai_sample_count--;
 		if (devpriv->ai_sample_count <= 0) {
 			devpriv->ai_cmd_running = 0;
@@ -1515,6 +1515,7 @@ static bool s626_handle_eos_interrupt(struct comedi_device *dev)
 			/* disable master interrupt */
 			finished = true;
 		}
+	}
 
 	if (devpriv->ai_cmd_running && cmd->scan_begin_src == TRIG_EXT)
 		s626_dio_set_irq(dev, cmd->scan_begin_arg);