staging: comedi: amplc_pc263: Use IS_ENABLED()
Change conditional compilation on kernel options to use the IS_ENABLED()
macro. Remove most of the #ifdef lines and add extra if
(IS_ENABLED(xxx)) tests so the compiler can remove unreachable code.
The pci_driver stuff and device table is still conditionally compiled.
In pc263_attach() move the call to alloc_private() as it is only used
for PCI devices. (In pc263_detach(), for ISA devices a non-zero
dev->iobase means the I/O region needs releasing.)
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/comedi/drivers/amplc_pc263.c b/drivers/staging/comedi/drivers/amplc_pc263.c
index f38a56e..f33eb0d 100644
--- a/drivers/staging/comedi/drivers/amplc_pc263.c
+++ b/drivers/staging/comedi/drivers/amplc_pc263.c
@@ -48,14 +48,6 @@
#define PC263_DRIVER_NAME "amplc_pc263"
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA_MODULE
-#define CONFIG_COMEDI_AMPLC_PC263_ISA
-#endif
-
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI_MODULE
-#define CONFIG_COMEDI_AMPLC_PC263_PCI
-#endif
-
/* PCI263 PCI configuration register information */
#define PCI_VENDOR_ID_AMPLICON 0x14dc
#define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
@@ -79,33 +71,33 @@
enum pc263_model model;
};
static const struct pc263_board pc263_boards[] = {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
+#if IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_ISA)
{
- .name = "pc263",
- .fancy_name = "PC263",
- .bustype = isa_bustype,
- .model = pc263_model,
- },
+ .name = "pc263",
+ .fancy_name = "PC263",
+ .bustype = isa_bustype,
+ .model = pc263_model,
+ },
#endif
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
+#if IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI)
{
- .name = "pci263",
- .fancy_name = "PCI263",
- .devid = PCI_DEVICE_ID_AMPLICON_PCI263,
- .bustype = pci_bustype,
- .model = pci263_model,
- },
+ .name = "pci263",
+ .fancy_name = "PCI263",
+ .devid = PCI_DEVICE_ID_AMPLICON_PCI263,
+ .bustype = pci_bustype,
+ .model = pci263_model,
+ },
{
- .name = PC263_DRIVER_NAME,
- .fancy_name = PC263_DRIVER_NAME,
- .devid = PCI_DEVICE_ID_INVALID,
- .bustype = pci_bustype,
- .model = anypci_model, /* wildcard */
- },
+ .name = PC263_DRIVER_NAME,
+ .fancy_name = PC263_DRIVER_NAME,
+ .devid = PCI_DEVICE_ID_INVALID,
+ .bustype = pci_bustype,
+ .model = anypci_model, /* wildcard */
+ },
#endif
};
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
+#if IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI)
static DEFINE_PCI_DEVICE_TABLE(pc263_pci_table) = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
{0}
@@ -123,14 +115,12 @@
several hardware drivers keep similar information in this structure,
feel free to suggest moving the variable to the struct comedi_device struct.
*/
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
struct pc263_private {
/* PCI device. */
struct pci_dev *pci_dev;
};
#define devpriv ((struct pc263_private *)dev->private)
-#endif /* CONFIG_COMEDI_AMPLC_PC263_PCI */
/*
* The struct comedi_driver structure tells the Comedi core module
@@ -150,10 +140,8 @@
.num_names = ARRAY_SIZE(pc263_boards),
};
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
static int pc263_request_region(unsigned minor, unsigned long from,
unsigned long extent);
-#endif
static int pc263_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
@@ -162,7 +150,6 @@
* This function looks for a PCI device matching the requested board name,
* bus and slot.
*/
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
static int
pc263_find_pci(struct comedi_device *dev, int bus, int slot,
struct pci_dev **pci_dev_p)
@@ -218,7 +205,6 @@
}
return -EIO;
}
-#endif
/*
* Attach is called by the Comedi core to configure the driver
@@ -230,60 +216,35 @@
{
struct comedi_subdevice *s;
unsigned long iobase = 0;
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- struct pci_dev *pci_dev = NULL;
- int bus = 0, slot = 0;
-#endif
int ret;
printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
PC263_DRIVER_NAME);
-/*
- * Allocate the private structure area. alloc_private() is a
- * convenient macro defined in comedidev.h.
- */
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- ret = alloc_private(dev, sizeof(struct pc263_private));
- if (ret < 0) {
- printk(KERN_ERR "comedi%d: error! out of memory!\n",
- dev->minor);
- return ret;
- }
-#endif
- /* Process options. */
- switch (thisboard->bustype) {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
- case isa_bustype:
+
+ /* Process options and reserve resources according to bus type. */
+ if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_ISA) &&
+ thisboard->bustype == isa_bustype) {
iobase = it->options[0];
- break;
-#endif
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- case pci_bustype:
+ ret = pc263_request_region(dev->minor, iobase, PC263_IO_SIZE);
+ if (ret < 0)
+ return ret;
+ } else if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI) &&
+ thisboard->bustype == pci_bustype) {
+ struct pci_dev *pci_dev = NULL;
+ int bus, slot;
+
+ ret = alloc_private(dev, sizeof(struct pc263_private));
+ if (ret < 0) {
+ printk(KERN_ERR "comedi%d: error! out of memory!\n",
+ dev->minor);
+ return ret;
+ }
bus = it->options[0];
slot = it->options[1];
-
ret = pc263_find_pci(dev, bus, slot, &pci_dev);
if (ret < 0)
return ret;
devpriv->pci_dev = pci_dev;
- break;
-#endif
- default:
- printk(KERN_ERR
- "comedi%d: %s: BUG! cannot determine board type!\n",
- dev->minor, PC263_DRIVER_NAME);
- return -EINVAL;
- break;
- }
-
-/*
- * Initialize dev->board_name.
- */
- dev->board_name = thisboard->name;
-
- /* Enable device and reserve I/O spaces. */
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- if (pci_dev) {
ret = comedi_pci_enable(pci_dev, PC263_DRIVER_NAME);
if (ret < 0) {
printk(KERN_ERR
@@ -293,21 +254,16 @@
return ret;
}
iobase = pci_resource_start(pci_dev, 2);
- } else
-#endif
- {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
- ret = pc263_request_region(dev->minor, iobase, PC263_IO_SIZE);
- if (ret < 0)
- return ret;
-#endif
+ } else {
+ printk(KERN_ERR
+ "comedi%d: %s: BUG! cannot determine board type!\n",
+ dev->minor, PC263_DRIVER_NAME);
+ return -EINVAL;
}
+
+ dev->board_name = thisboard->name;
dev->iobase = iobase;
-/*
- * Allocate the subdevice structures. alloc_subdevice() is a
- * convenient macro defined in comedidev.h.
- */
ret = alloc_subdevices(dev, 1);
if (ret < 0) {
printk(KERN_ERR "comedi%d: error! out of memory!\n",
@@ -327,20 +283,12 @@
s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
- switch (thisboard->bustype) {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
- case isa_bustype:
+ if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_ISA) &&
+ thisboard->bustype == isa_bustype)
printk("(base %#lx) ", iobase);
- break;
-#endif
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- case pci_bustype:
- printk("(pci %s) ", pci_name(pci_dev));
- break;
-#endif
- default:
- break;
- }
+ else if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI) &&
+ thisboard->bustype == pci_bustype)
+ printk("(pci %s) ", pci_name(devpriv->pci_dev));
printk("attached\n");
@@ -349,23 +297,14 @@
static void pc263_detach(struct comedi_device *dev)
{
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- if (devpriv)
-#endif
- {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
- if (devpriv->pci_dev) {
- if (dev->iobase)
- comedi_pci_disable(devpriv->pci_dev);
- pci_dev_put(devpriv->pci_dev);
- } else
-#endif
- {
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
- if (dev->iobase)
- release_region(dev->iobase, PC263_IO_SIZE);
-#endif
- }
+ if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI) && devpriv &&
+ devpriv->pci_dev) {
+ if (dev->iobase)
+ comedi_pci_disable(devpriv->pci_dev);
+ pci_dev_put(devpriv->pci_dev);
+ } else if (IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_ISA)) {
+ if (dev->iobase)
+ release_region(dev->iobase, PC263_IO_SIZE);
}
}
@@ -373,7 +312,6 @@
* This function checks and requests an I/O region, reporting an error
* if there is a conflict.
*/
-#ifdef CONFIG_COMEDI_AMPLC_PC263_ISA
static int pc263_request_region(unsigned minor, unsigned long from,
unsigned long extent)
{
@@ -384,7 +322,6 @@
}
return 0;
}
-#endif
static int pc263_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
@@ -416,7 +353,7 @@
* A convenient macro that defines init_module() and cleanup_module(),
* as necessary.
*/
-#ifdef CONFIG_COMEDI_AMPLC_PC263_PCI
+#if IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI)
static int __devinit driver_amplc_pc263_pci_probe(struct pci_dev *dev,
const struct pci_device_id
*ent)