From 1022f64e7548a3bede7c671c6d52592f05954bd5 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 4 Nov 2014 10:54:55 -0700 Subject: [PATCH] staging: comedi: addi_apci_3120: set scan length/start after programming chanlist The APCI-3120 documentation says that the PR/PA bits should be set after the chanlist sequence is programmed. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/addi_apci_3120.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/comedi/drivers/addi_apci_3120.c b/drivers/staging/comedi/drivers/addi_apci_3120.c index 77499b473bb4..f258ceb144fb 100644 --- a/drivers/staging/comedi/drivers/addi_apci_3120.c +++ b/drivers/staging/comedi/drivers/addi_apci_3120.c @@ -286,10 +286,6 @@ static void apci3120_set_chanlist(struct comedi_device *dev, struct apci3120_private *devpriv = dev->private; int i; - /* set scan length (PR) and scan start (PA) */ - devpriv->ctrl = APCI3120_CTRL_PR(n_chan - 1) | APCI3120_CTRL_PA(0); - outw(devpriv->ctrl, dev->iobase + APCI3120_CTRL_REG); - /* set chanlist for scan */ for (i = 0; i < n_chan; i++) { unsigned int chan = CR_CHAN(chanlist[i]); @@ -307,6 +303,10 @@ static void apci3120_set_chanlist(struct comedi_device *dev, } apci3120_ai_reset_fifo(dev); + + /* set scan length (PR) and scan start (PA) */ + devpriv->ctrl = APCI3120_CTRL_PR(n_chan - 1) | APCI3120_CTRL_PA(0); + outw(devpriv->ctrl, dev->iobase + APCI3120_CTRL_REG); } #include "addi-data/hwdrv_apci3120.c" -- 2.34.1