The timer subdevice can generate an interrupt. Currently send_sig() is used
to let the task know when the interrupt occurs. Use the dev->read_subdev
and comedi_handle_events() instead.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/addi_apci_1564.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c
b/drivers/staging/comedi/drivers/addi_apci_1564.c
index 37e18b3..d7b920e 100644
--- a/drivers/staging/comedi/drivers/addi_apci_1564.c
+++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
@@ -117,6 +117,7 @@
* the state of the interrupt capable inputs.
*/
#define APCI1564_EVENT_COS BIT(31)
+#define APCI1564_EVENT_TIMER BIT(30)
#define APCI1564_EVENT_MASK 0xfff0000f /* all but [19:4] */
struct apci1564_private {
@@ -187,15 +188,12 @@ static irqreturn_t apci1564_interrupt(int irq, void *d)
}
status = inl(devpriv->timer + ADDI_TCW_IRQ_REG);
- if (status & 0x01) {
- /* Disable Timer Interrupt */
+ if (status & ADDI_TCW_IRQ) {
+ s->state |= APCI1564_EVENT_TIMER;
+
+ /* clear the interrupt */
ctrl = inl(devpriv->timer + ADDI_TCW_CTRL_REG);
outl(0x0, devpriv->timer + ADDI_TCW_CTRL_REG);
-
- /* Send a signal to from kernel to user space */
- send_sig(SIGIO, devpriv->tsk_current, 0);
-
- /* Enable Timer Interrupt */
outl(ctrl, devpriv->timer + ADDI_TCW_CTRL_REG);
}
--
2.8.2
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