Commit 351a7bff authored Sep 18, 2014 by H Hartley Sweeten Committed by Greg Kroah-Hartman Oct 20, 2014

staging: comedi: rtd520: clear FIFO when canceling async command



Clear the A/D FIFO as part of the analog input (*cancel) to help with
cleaning up the async command.

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>

parent 365dae93

drivers/staging/comedi/drivers/rtd520.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1083,6 +1083,7 @@ static int rtd_ai_cancel(struct comedi_device dev, struct comedi_subdevice s)
		devpriv->ai_count = 0; /* stop and don't transfer any more */
		status = readw(dev->mmio + LAS0_IT);
		overrun = readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
		writel(0, dev->mmio + LAS0_ADC_FIFO_CLEAR);
		return 0;
		}