diff options
Diffstat (limited to 'drivers/pnp/manager.c')
| -rw-r--r-- | drivers/pnp/manager.c | 78 |
1 files changed, 59 insertions, 19 deletions
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c index 261668618b2..c4256aa32bc 100644 --- a/drivers/pnp/manager.c +++ b/drivers/pnp/manager.c @@ -470,6 +470,53 @@ int pnp_auto_config_dev(struct pnp_dev *dev) } /** + * pnp_start_dev - low-level start of the PnP device + * @dev: pointer to the desired device + * + * assumes that resources have alread been allocated + */ + +int pnp_start_dev(struct pnp_dev *dev) +{ + if (!pnp_can_write(dev)) { + pnp_info("Device %s does not supported activation.", dev->dev.bus_id); + return -EINVAL; + } + + if (dev->protocol->set(dev, &dev->res)<0) { + pnp_err("Failed to activate device %s.", dev->dev.bus_id); + return -EIO; + } + + pnp_info("Device %s activated.", dev->dev.bus_id); + + return 0; +} + +/** + * pnp_stop_dev - low-level disable of the PnP device + * @dev: pointer to the desired device + * + * does not free resources + */ + +int pnp_stop_dev(struct pnp_dev *dev) +{ + if (!pnp_can_disable(dev)) { + pnp_info("Device %s does not supported disabling.", dev->dev.bus_id); + return -EINVAL; + } + if (dev->protocol->disable(dev)<0) { + pnp_err("Failed to disable device %s.", dev->dev.bus_id); + return -EIO; + } + + pnp_info("Device %s disabled.", dev->dev.bus_id); + + return 0; +} + +/** * pnp_activate_dev - activates a PnP device for use * @dev: pointer to the desired device * @@ -477,6 +524,8 @@ int pnp_auto_config_dev(struct pnp_dev *dev) */ int pnp_activate_dev(struct pnp_dev *dev) { + int error; + if (!dev) return -EINVAL; if (dev->active) { @@ -487,18 +536,11 @@ int pnp_activate_dev(struct pnp_dev *dev) if (pnp_auto_config_dev(dev)) return -EBUSY; - if (!pnp_can_write(dev)) { - pnp_info("Device %s does not supported activation.", dev->dev.bus_id); - return -EINVAL; - } - - if (dev->protocol->set(dev, &dev->res)<0) { - pnp_err("Failed to activate device %s.", dev->dev.bus_id); - return -EIO; - } + error = pnp_start_dev(dev); + if (error) + return error; dev->active = 1; - pnp_info("Device %s activated.", dev->dev.bus_id); return 1; } @@ -511,23 +553,19 @@ int pnp_activate_dev(struct pnp_dev *dev) */ int pnp_disable_dev(struct pnp_dev *dev) { + int error; + if (!dev) return -EINVAL; if (!dev->active) { return 0; /* the device is already disabled */ } - if (!pnp_can_disable(dev)) { - pnp_info("Device %s does not supported disabling.", dev->dev.bus_id); - return -EINVAL; - } - if (dev->protocol->disable(dev)<0) { - pnp_err("Failed to disable device %s.", dev->dev.bus_id); - return -EIO; - } + error = pnp_stop_dev(dev); + if (error) + return error; dev->active = 0; - pnp_info("Device %s disabled.", dev->dev.bus_id); /* release the resources so that other devices can use them */ down(&pnp_res_mutex); @@ -558,6 +596,8 @@ EXPORT_SYMBOL(pnp_manual_config_dev); #if 0 EXPORT_SYMBOL(pnp_auto_config_dev); #endif +EXPORT_SYMBOL(pnp_start_dev); +EXPORT_SYMBOL(pnp_stop_dev); EXPORT_SYMBOL(pnp_activate_dev); EXPORT_SYMBOL(pnp_disable_dev); EXPORT_SYMBOL(pnp_resource_change); |