From 5f6c2a954d17544c68ce83d016ea456207cadeac Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Mon, 3 Dec 2012 18:15:46 +0000 Subject: [PATCH] staging: comedi: addi_apci_2032: always initialize interrupt subdevice Initialize the special interrupt subdevice as a digital input subdevice even if the interrupt handler cannot be registered. It's `insn_bits` handler will still read the interrupt status register. This hardware status bits in this register might be valid even if they haven't been enabled in the interrupt control register, but this needs to be checked. In any case, initializing the subdevice as a digital input subdevice is harmless. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/addi_apci_2032.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/staging/comedi/drivers/addi_apci_2032.c b/drivers/staging/comedi/drivers/addi_apci_2032.c index dd81ddc3d986..c302bf9ba4ec 100644 --- a/drivers/staging/comedi/drivers/addi_apci_2032.c +++ b/drivers/staging/comedi/drivers/addi_apci_2032.c @@ -377,6 +377,12 @@ static int apci2032_auto_attach(struct comedi_device *dev, /* Initialize the interrupt subdevice */ s = &dev->subdevices[2]; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE; + s->n_chan = 2; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = apci2032_int_insn_bits; if (dev->irq) { struct apci2032_int_private *subpriv; @@ -386,18 +392,11 @@ static int apci2032_auto_attach(struct comedi_device *dev, return -ENOMEM; spin_lock_init(&subpriv->spinlock); s->private = subpriv; - s->type = COMEDI_SUBD_DI; s->subdev_flags = SDF_READABLE | SDF_CMD_READ; - s->n_chan = 2; s->len_chanlist = 2; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = apci2032_int_insn_bits; s->do_cmdtest = apci2032_int_cmdtest; s->do_cmd = apci2032_int_cmd; s->cancel = apci2032_int_cancel; - } else { - s->type = COMEDI_SUBD_UNUSED; } return 0; -- 2.20.1