Commit 77e7c200 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: quatech_daqp_cs: handle shared interrupt 



This is a PCMCIA driver and interrupts are always shared. Detect if
the hardware did not produce the interrupt and return IRQ_NONE so
that other drivers might handle it.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f676376d

drivers/staging/comedi/drivers/quatech_daqp_cs.c

+3 −0
Original line number Diff line number Diff line
@@ -214,6 +214,9 @@ static irqreturn_t daqp_interrupt(int irq, void *dev_id) 
		return IRQ_NONE;



	status = inb(dev->iobase + DAQP_STATUS_REG);

	if (!(status & DAQP_STATUS_EVENTS))

		return IRQ_NONE;



	while (!(status & DAQP_STATUS_FIFO_EMPTY)) {

		unsigned short data;