diff options
| -rw-r--r-- | drivers/comedi/drivers/pcmmio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/pcmmio.c b/drivers/comedi/drivers/pcmmio.c index d38202c8a12b..f42b7343b4e4 100644 --- a/drivers/comedi/drivers/pcmmio.c +++ b/drivers/comedi/drivers/pcmmio.c @@ -362,6 +362,9 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d) unsigned int triggered; unsigned char int_pend; + if (!dev->attached) + return IRQ_NONE; + /* are there any interrupts pending */ int_pend = inb(dev->iobase + PCMMIO_INT_PENDING_REG) & 0x07; if (!int_pend) |