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staging: comedi: das08: Move I/O resource (de)allocation. 

Don't deal with allocation and deallocation of I/O resources and PCI
enabling/disabling in the exported functions das08_common_attach() and
das08_common_detach().  Do it in das08_attach() and new function
das08_detach() (which is now the comedi detach() hook for this driver).

This keeps things more symmetrical.  Callers of das08_common_attach()
and das08_common_detach() are now responsible for allocation of their
own I/O resources and enabling of their own devices.  The only external
caller of das08_common_attach() and das08_common_detach() is the
das08_cs module, which looks after its own I/O resources.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-05-24 17:27:12 +01:00 committed by Greg Kroah-Hartman
parent 4b5c0f106e
commit d60d9f34d3
1 changed files with 27 additions and 30 deletions
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57
drivers/staging/comedi/drivers/das08.c
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@ -861,12 +861,13 @@ static int das08_counter_config(struct comedi_device *dev,
#ifdef DO_COMEDI_DRIVER_REGISTER
static int das08_attach(struct comedi_device *dev, struct comedi_devconfig *it);
static void das08_detach(struct comedi_device *dev);
static struct comedi_driver driver_das08 = {
.driver_name = DRV_NAME,
.module = THIS_MODULE,
.attach = das08_attach,
.detach = das08_common_detach,
.detach = das08_detach,
.board_name = &das08_boards[0].name,
.num_names = sizeof(das08_boards) / sizeof(struct das08_board_struct),
.offset = sizeof(struct das08_board_struct),
@ -878,14 +879,6 @@ int das08_common_attach(struct comedi_device *dev, unsigned long iobase)
struct comedi_subdevice *s;
int ret;
/* allocate ioports for non-pcmcia, non-pci boards */
if ((thisboard->bustype != pcmcia) && (thisboard->bustype != pci)) {
printk(KERN_INFO " iobase 0x%lx\n", iobase);
if (!request_region(iobase, thisboard->iosize, DRV_NAME)) {
printk(KERN_ERR " I/O port conflict\n");
return -EIO;
}
}
dev->iobase = iobase;
dev->board_name = thisboard->name;
@ -996,19 +989,15 @@ static int das08_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
int ret;
unsigned long iobase;
#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI)
unsigned long pci_iobase = 0;
struct pci_dev *pdev = NULL;
#endif
ret = alloc_private(dev, sizeof(struct das08_private_struct));
if (ret < 0)
return ret;
printk(KERN_INFO "comedi%d: das08: ", dev->minor);
#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI)
/* deal with a pci board */
if (thisboard->bustype == pci) {
if (IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) && thisboard->bustype == pci) {
unsigned long pci_iobase = 0;
struct pci_dev *pdev = NULL;
if (it->options[0] || it->options[1]) {
printk("bus %i slot %i ",
it->options[0], it->options[1]);
@ -1057,13 +1046,16 @@ static int das08_attach(struct comedi_device *dev, struct comedi_devconfig *it)
/* Enable local interrupt 1 and pci interrupt */
outw(INTR1_ENABLE | PCI_INTR_ENABLE, pci_iobase + INTCSR);
#endif
} else
#endif /* IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) */
{
} else if (IS_ENABLED(CONFIG_COMEDI_DAS08_ISA) &&
(thisboard->bustype == isa || thisboard->bustype == pc104)) {
iobase = it->options[0];
}
printk(KERN_INFO "\n");
printk(KERN_INFO " iobase 0x%lx\n", iobase);
if (!request_region(iobase, thisboard->iosize, DRV_NAME)) {
printk(KERN_ERR " I/O port conflict\n");
return -EIO;
}
} else
return -EIO;
return das08_common_attach(dev, iobase);
}
#endif /* DO_COMEDI_DRIVER_REGISTER */
@ -1072,22 +1064,27 @@ void das08_common_detach(struct comedi_device *dev)
{
if (dev->subdevices)
subdev_8255_cleanup(dev, dev->subdevices + 4);
if ((thisboard->bustype != pcmcia) && (thisboard->bustype != pci)) {
}
EXPORT_SYMBOL_GPL(das08_common_detach);
#ifdef DO_COMEDI_DRIVER_REGISTER
static void das08_detach(struct comedi_device *dev)
{
das08_common_detach(dev);
if (IS_ENABLED(CONFIG_COMEDI_DAS08_ISA) &&
(thisboard->bustype == isa || thisboard->bustype == pc104)) {
if (dev->iobase)
release_region(dev->iobase, thisboard->iosize);
}
#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI)
if (devpriv) {
if (devpriv->pdev) {
} else if (IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) &&
thisboard->bustype == pci) {
if (devpriv && devpriv->pdev) {
if (devpriv->pci_iobase)
comedi_pci_disable(devpriv->pdev);
pci_dev_put(devpriv->pdev);
}
}
#endif
}
EXPORT_SYMBOL_GPL(das08_common_detach);
#endif /* DO_COMEDI_DRIVER_REGISTER */
#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI)
static int __devinit driver_das08_pci_probe(struct pci_dev *dev,