diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2013-03-15 13:15:35 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-15 09:16:31 -0700 |
| commit | 00ca6884186f18a758eae37e94f7c3c0527f8f30 (patch) | |
| tree | 69190496dd4ac8e099a2cd0cf0b21d19551cbab9 /drivers/staging | |
| parent | 13f12b5aea501bce146cdf213d1819083aadc847 (diff) | |
staging: comedi: add 'ioenabled' flag to device
Add 1-bit bit-field member `ioenabled` of type `bool` to `struct
comedi_device`. Use this to keep track of whether a PCI device and its
BARs have been successfully enabled by `comedi_pci_enable()`. This
avoids overloading the meaning of the `iobase` member which is used by
several drivers to hold the base port I/O address of a board's "main"
registers. Other drivers using MMIO use `iobase` as a flag to indicate
that the preceding call to `comedi_pci_enable()` was successful. They
no longer need to do that.
The name `ioenabled` is intended to be PCI-agnostic so it can be used
for similar purposes by non-PCI drivers.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/comedi_pci.c | 5 | ||||
| -rw-r--r-- | drivers/staging/comedi/comedidev.h | 1 | ||||
| -rw-r--r-- | drivers/staging/comedi/drivers.c | 1 |
3 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/comedi/comedi_pci.c b/drivers/staging/comedi/comedi_pci.c index b164b0353eb..6f3cdf88f05 100644 --- a/drivers/staging/comedi/comedi_pci.c +++ b/drivers/staging/comedi/comedi_pci.c @@ -55,6 +55,8 @@ int comedi_pci_enable(struct comedi_device *dev) : dev->driver->driver_name); if (rc < 0) pci_disable_device(pcidev); + else + dev->ioenabled = true; return rc; } @@ -68,10 +70,11 @@ void comedi_pci_disable(struct comedi_device *dev) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); - if (pcidev && dev->iobase) { + if (pcidev && dev->ioenabled) { pci_release_regions(pcidev); pci_disable_device(pcidev); } + dev->ioenabled = false; } EXPORT_SYMBOL_GPL(comedi_pci_disable); diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index 86de4ff9501..9c8662a051d 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -209,6 +209,7 @@ struct comedi_device { const void *board_ptr; bool attached:1; bool in_request_module:1; + bool ioenabled:1; spinlock_t spinlock; struct mutex mutex; diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c index 87052735d91..4724f275830 100644 --- a/drivers/staging/comedi/drivers.c +++ b/drivers/staging/comedi/drivers.c @@ -110,6 +110,7 @@ static void cleanup_device(struct comedi_device *dev) dev->board_name = NULL; dev->board_ptr = NULL; dev->iobase = 0; + dev->ioenabled = false; dev->irq = 0; dev->read_subdev = NULL; dev->write_subdev = NULL; |