From 6847df631faedfef33170eed8d81430a4917b8b0 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 5 Aug 2015 10:45:10 -0700 Subject: [PATCH] staging: comedi: me4000: fix me4000_ai_cancel() The STOP and IMMEDIATE_STOP bits in the ME4000_AI_CTRL_REG should be set, not cleared, to stop any running conversions. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/me4000.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index b30305b44300..a171971b6a87 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -529,12 +529,12 @@ static int me4000_ai_insn_read(struct comedi_device *dev, static int me4000_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { - unsigned int tmp; + unsigned int ctrl; /* Stop any running conversion */ - tmp = inl(dev->iobase + ME4000_AI_CTRL_REG); - tmp &= ~(ME4000_AI_CTRL_STOP | ME4000_AI_CTRL_IMMEDIATE_STOP); - outl(tmp, dev->iobase + ME4000_AI_CTRL_REG); + ctrl = inl(dev->iobase + ME4000_AI_CTRL_REG); + ctrl |= ME4000_AI_CTRL_STOP | ME4000_AI_CTRL_IMMEDIATE_STOP; + outl(ctrl, dev->iobase + ME4000_AI_CTRL_REG); /* Clear the control register */ outl(0x0, dev->iobase + ME4000_AI_CTRL_REG); -- 2.11.0