From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Mon, 10 Feb 2014 18:49:05 +0000 (-0700)
Subject: staging: comedi: ii_pci20kc: use comedi_timeout()
X-Git-Tag: next-20140306~21^2~392
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=83b4d991253dd764cfcb46fb10ef73bbff913e47;p=karo-tx-linux.git

staging: comedi: ii_pci20kc: use comedi_timeout()

Use comedi_timeout() to wait for the analog input end-of-conversion.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c b/drivers/staging/comedi/drivers/ii_pci20kc.c
index 8577778441fa..3558ab3b6e1f 100644
--- a/drivers/staging/comedi/drivers/ii_pci20kc.c
+++ b/drivers/staging/comedi/drivers/ii_pci20kc.c
@@ -190,20 +190,18 @@ static int ii20k_ao_insn_write(struct comedi_device *dev,
 	return insn->n;
 }
 
-static int ii20k_ai_wait_eoc(struct comedi_device *dev,
-			     struct comedi_subdevice *s,
-			     int timeout)
+static int ii20k_ai_eoc(struct comedi_device *dev,
+			struct comedi_subdevice *s,
+			struct comedi_insn *insn,
+			unsigned long context)
 {
 	void __iomem *iobase = ii20k_module_iobase(dev, s);
 	unsigned char status;
 
-	do {
-		status = readb(iobase + II20K_AI_STATUS_REG);
-		if ((status & II20K_AI_STATUS_INT) == 0)
-			return 0;
-	} while (timeout--);
-
-	return -ETIME;
+	status = readb(iobase + II20K_AI_STATUS_REG);
+	if ((status & II20K_AI_STATUS_INT) == 0)
+		return 0;
+	return -EBUSY;
 }
 
 static void ii20k_ai_setup(struct comedi_device *dev,
@@ -263,7 +261,7 @@ static int ii20k_ai_insn_read(struct comedi_device *dev,
 		/* generate a software start convert signal */
 		readb(iobase + II20K_AI_PACER_RESET_REG);
 
-		ret = ii20k_ai_wait_eoc(dev, s, 100);
+		ret = comedi_timeout(dev, s, insn, ii20k_ai_eoc, 0);
 		if (ret)
 			return ret;