Unfortunatly, since there could be two asics, we can't use dev->read_subdev
to get the subdevice. But, the comedi_subdevice associated with the 'asic'
can easily be calculated. This allows removing the for () loop that searched
for the correct subdevice.
Tidy up the function.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
v2: add missing Signed-off-by
drivers/staging/comedi/drivers/pcmuio.c | 44 +++++++++++----------------------
1 file changed, 15 insertions(+), 29 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcmuio.c
b/drivers/staging/comedi/drivers/pcmuio.c
index f7032fe..8752d4d 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -354,38 +354,24 @@ done:
static int pcmuio_handle_asic_interrupt(struct comedi_device *dev, int asic)
{
- struct pcmuio_subdev_private *subpriv;
+ /* there are could be two asics so we can't use dev->read_subdev */
+ struct comedi_subdevice *s = &dev->subdevices[asic * 2];
unsigned long iobase = dev->iobase + (asic * PCMUIO_ASIC_IOSIZE);
- unsigned int triggered = 0;
- int got1 = 0;
- unsigned char int_pend;
- int i;
-
- int_pend = inb(iobase + PCMUIO_INT_PENDING_REG) & 0x07;
- if (int_pend) {
- triggered = pcmuio_read(dev, asic, PCMUIO_PAGE_INT_ID, 0);
- pcmuio_write(dev, 0, asic, PCMUIO_PAGE_INT_ID, 0);
+ unsigned int val;
- ++got1;
- }
+ /* are there any interrupts pending */
+ val = inb(iobase + PCMUIO_INT_PENDING_REG) & 0x07;
+ if (!val)
+ return 0;
- if (triggered) {
- struct comedi_subdevice *s;
- /* TODO here: dispatch io lines to subdevs with commands.. */
- for (i = 0; i < dev->n_subdevices; i++) {
- s = &dev->subdevices[i];
- subpriv = s->private;
- if (subpriv->intr.asic == asic) {
- /*
- * This is an interrupt subdev, and it
- * matches this asic!
- */
- pcmuio_handle_intr_subdev(dev, s,
- triggered);
- }
- }
- }
- return got1;
+ /* get, and clear, the pending interrupts */
+ val = pcmuio_read(dev, asic, PCMUIO_PAGE_INT_ID, 0);
+ pcmuio_write(dev, 0, asic, PCMUIO_PAGE_INT_ID, 0);
+
+ /* handle the pending interrupts */
+ pcmuio_handle_intr_subdev(dev, s, val);
+
+ return 1;
}
static irqreturn_t pcmuio_interrupt(int irq, void *d)
--
1.8.4.4
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