staging: comedi: das800: 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/das800.c b/drivers/staging/comedi/drivers/das800.c
index 5af0a57..dbe94ce 100644 (file)
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -556,15 +556,17 @@ static irqreturn_t das800_interrupt(int irq, void *d)
        return IRQ_HANDLED;
 }
 
-static int das800_wait_for_conv(struct comedi_device *dev, int timeout)
+static int das800_ai_eoc(struct comedi_device *dev,
+                        struct comedi_subdevice *s,
+                        struct comedi_insn *insn,
+                        unsigned long context)
 {
-       int i;
+       unsigned int status;
 
-       for (i = 0; i < timeout; i++) {
-               if (!(inb(dev->iobase + DAS800_STATUS) & BUSY))
-                       return 0;
-       }
-       return -ETIME;
+       status = inb(dev->iobase + DAS800_STATUS);
+       if ((status & BUSY) == 0)
+               return 0;
+       return -EBUSY;
 }
 
 static int das800_ai_insn_read(struct comedi_device *dev,
@@ -599,7 +601,7 @@ static int das800_ai_insn_read(struct comedi_device *dev,
                /* trigger conversion */
                outb_p(0, dev->iobase + DAS800_MSB);
 
-               ret = das800_wait_for_conv(dev, 1000);
+               ret = comedi_timeout(dev, s, insn, das800_ai_eoc, 0);
                if (ret)
                        return ret;