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 <[email protected]> --- drivers/staging/comedi/comedi_pci.c | 5 ++++- drivers/staging/comedi/comedidev.h | 1 + drivers/staging/comedi/drivers.c | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/staging/comedi/comedi_pci.c b/drivers/staging/comedi/comedi_pci.c index b164b03..6f3cdf8 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 86de4ff..9c8662a 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 8705273..4724f27 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; -- 1.8.1.5 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
