staging: comedi: das16: 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/das16.c b/drivers/staging/comedi/drivers/das16.c
index a8446ca..6a7d652 100644 (file)
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -856,18 +856,17 @@ static void das16_ai_munge(struct comedi_device *dev,
        }
 }
 
-static int das16_ai_wait_for_conv(struct comedi_device *dev,
-                                 unsigned int timeout)
+static int das16_ai_eoc(struct comedi_device *dev,
+                       struct comedi_subdevice *s,
+                       struct comedi_insn *insn,
+                       unsigned long context)
 {
        unsigned int status;
-       int i;
 
-       for (i = 0; i < timeout; i++) {
-               status = inb(dev->iobase + DAS16_STATUS_REG);
-               if (!(status & DAS16_STATUS_BUSY))
-                       return 0;
-       }
-       return -ETIME;
+       status = inb(dev->iobase + DAS16_STATUS_REG);
+       if ((status & DAS16_STATUS_BUSY) == 0)
+               return 0;
+       return -EBUSY;
 }
 
 static int das16_ai_insn_read(struct comedi_device *dev,
@@ -897,7 +896,7 @@ static int das16_ai_insn_read(struct comedi_device *dev,
                /* trigger conversion */
                outb_p(0, dev->iobase + DAS16_TRIG_REG);
 
-               ret = das16_ai_wait_for_conv(dev, 1000);
+               ret = comedi_timeout(dev, s, insn, das16_ai_eoc, 0);
                if (ret)
                        return ret;