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staging: comedi: amplc_pc236: don't check bus type in attach

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Since the legacy attach routine `pc236_attach()` is only called for
board names matching an entry in our array of ISA boards
`pc236_isa_boards[]`, and it is reasonable to expect all elements of
`pc236_isa_boards[]` to have their `bustype` member initialized
correctly to `isa_bustype`, don't bother checking the bus type in
`pc236_attach()`.  Add `if (!DO_ISA) return -EINVAL` to optimize out the
remainder of the function if `CONFIG_COMEDI_AMPLC_PC236_ISA` is not
defined.

Similarly, don't bother checking the bus type in
`pc236_find_pci_board()` as it is reasonable to expect all elements of
`pc236_pci_boards[]` to have their `bustype` member initialized
correctly to `pci_bustype`.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2014-07-25 10:04:55 +01:00 committed by Greg Kroah-Hartman
parent 22c39196b6
commit ffe2d9fd49
1 changed files with 8 additions and 18 deletions
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18
drivers/staging/comedi/drivers/amplc_pc236.c
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@ -129,8 +129,7 @@ static const struct pc236_board *pc236_find_pci_board(struct pci_dev *pci_dev)
unsigned int i;
for (i = 0; i < ARRAY_SIZE(pc236_pci_boards); i++)
if (is_pci_board(&pc236_pci_boards[i]) &&
pci_dev->device == pc236_pci_boards[i].devid)
if (pci_dev->device == pc236_pci_boards[i].devid)
return &pc236_pci_boards[i];
return NULL;
}
@ -349,30 +348,21 @@ static int pc236_common_attach(struct comedi_device *dev, unsigned long iobase,
static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
const struct pc236_board *thisboard = comedi_board(dev);
struct pc236_private *devpriv;
int ret;
if (!DO_ISA)
return -EINVAL;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
/* Process options according to bus type. */
if (is_isa_board(thisboard)) {
ret = comedi_request_region(dev, it->options[0], 0x4);
if (ret)
return ret;
return pc236_common_attach(dev, dev->iobase, it->options[1], 0);
} else if (is_pci_board(thisboard)) {
dev_err(dev->class_dev,
"Manual configuration of PCI board '%s' is not supported\n",
thisboard->name);
return -EIO;
}
dev_err(dev->class_dev, "BUG! cannot determine board type!\n");
return -EINVAL;
}
static int pc236_auto_attach(struct comedi_device *dev,