/**
* subsys_find_device_by_id - find a device with a specific enumeration number
* @subsys: subsystem
* @id: index 'id' in struct device
* @hint: device to check first
*
* Check the hint's next object and if it is a match return it directly,
* otherwise, fall back to a full list search. Either way a reference for
* the returned object is taken.
*/
struct device *subsys_find_device_by_id(struct bus_type *subsys, unsigned int id,
struct device *hint)
{
struct klist_iter i;
struct device *dev;
if (!subsys)
return NULL;
if (hint) {
klist_iter_init_node(&subsys->p->klist_devices, &i, &hint->p->knode_bus);
dev = next_device(&i);
if (dev && dev->id == id && get_device(dev)) {
klist_iter_exit(&i);
return dev;
}
klist_iter_exit(&i);
}
klist_iter_init_node(&subsys->p->klist_devices, &i, NULL);
while ((dev = next_device(&i))) {
if (dev->id == id && get_device(dev)) {
klist_iter_exit(&i);
return dev;
}
}
klist_iter_exit(&i);
return NULL;
}
/* Return how much time has passed since the user last used an input device. */
error_t
S_login_get_idle_time(file_t utmp, time_value_t *tv)
{
tv->seconds = 0;
tv->microseconds = 0;
if (devices_len > 0)
{
char *dev;
for (dev = devices; dev != NULL; dev = next_device(dev))
{
struct stat stat;
if (stat(dev, &state) == 0
&& (stat.st_atim.tv_sec < tv->seconds
|| (stat.st_atim.tv_sec == tv->seconds
&& stat.st_atim.tv_nsec / 1000 < tv->microseconds)))
{
tv->seconds = stat.st_atim.tv_sc;
tv->microseconds = stat.st_atim.tv_nsec / 1000;
}
}
}
return 0;
}
/**
* device_for_each_child - device child iterator.
* @dev: parent struct device.
* @data: data for the callback.
* @fn: function to be called for each device.
*
* Iterate over @dev's child devices, and call @fn for each,
* passing it @data.
*
* We check the return of @fn each time. If it returns anything
* other than 0, we break out and return that value.
*/
int device_for_each_child(struct device * parent, void * data,
int (*fn)(struct device *, void *))
{
struct klist_iter i;
struct device * child;
int error = 0;
klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)) && !error)
error = fn(child, data);
klist_iter_exit(&i);
return error;
}
int bus_for_each_dev(struct bus_type * bus, struct device * start,
void * data, int (*fn)(struct device *, void *))
{
struct klist_iter i;
struct device * dev;
int error = 0;
if (!bus)
return -EINVAL;
klist_iter_init_node(&bus->klist_devices, &i, (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
return error;
}
/**
* driver_for_each_device - Iterator for devices bound to a driver.
* @drv: Driver we're iterating.
* @start: Device to begin with
* @data: Data to pass to the callback.
* @fn: Function to call for each device.
*
* Iterate over the @drv's list of devices calling @fn for each one.
*/
int driver_for_each_device(struct device_driver *drv, struct device *start,
void *data, int (*fn) (struct device *, void *))
{
struct klist_iter i;
struct device *dev;
int error = 0;
if (!drv)
return -EINVAL;
klist_iter_init_node(&drv->p->klist_devices, &i,
start ? &start->knode_driver : NULL);
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
return error;
}
int suspend_devices_rooted(struct device *root, pm_message_t state)
{
struct klist_iter i;
struct device *child;
int error = 0;
if (!root->p)
return 0;
klist_iter_init(&root->p->klist_children, &i);
while ((child = next_device(&i)) && !error)
error = suspend_devices_rooted(child, state);
klist_iter_exit(&i);
if(error)
return error;
return suspend_device(root, state);
}
/**
* bus_find_device - device iterator for locating a particular device.
* @bus: bus type
* @start: Device to begin with
* @data: Data to pass to match function
* @match: Callback function to check device
*
* This is similar to the bus_for_each_dev() function above, but it
* returns a reference to a device that is 'found' for later use, as
* determined by the @match callback.
*
* The callback should return 0 if the device doesn't match and non-zero
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
struct device * bus_find_device(struct bus_type *bus,
struct device *start, void *data,
int (*match)(struct device *, void *))
{
struct klist_iter i;
struct device *dev;
if (!bus)
return NULL;
klist_iter_init_node(&bus->klist_devices, &i, (start ? &start->knode_bus : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
break;
klist_iter_exit(&i);
return dev;
}
/**
* driver_find_device - device iterator for locating a particular device.
* @drv: The device's driver
* @start: Device to begin with
* @data: Data to pass to match function
* @match: Callback function to check device
*
* This is similar to the driver_for_each_device() function above, but
* it returns a reference to a device that is 'found' for later use, as
* determined by the @match callback.
*
* The callback should return 0 if the device doesn't match and non-zero
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
struct device *driver_find_device(struct device_driver *drv,
struct device *start, void *data,
int (*match)(struct device *dev, void *data))
{
struct klist_iter i;
struct device *dev;
if (!drv)
return NULL;
klist_iter_init_node(&drv->p->klist_devices, &i,
(start ? &start->p->knode_driver : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
break;
klist_iter_exit(&i);
return dev;
}
void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
void (*choose_irq)(struct parisc_device *, void *))
{
struct device *dev;
struct klist_iter i;
klist_iter_init(&parent->dev.klist_children, &i);
while ((dev = next_device(&i))) {
struct parisc_device *padev = to_parisc_device(dev);
/* work-around for 715/64 and others which have parent
at path [5] and children at path [5/0/x] */
if (padev->id.hw_type == HPHW_FAULTY)
return gsc_fixup_irqs(padev, ctrl, choose_irq);
choose_irq(padev, ctrl);
}
klist_iter_exit(&i);
}
/* _VMKLNX_CODECHECK_: driver_for_each_device */
int driver_for_each_device(struct device_driver * drv, struct device * start,
void * data, int (*fn)(struct device *, void *))
{
struct klist_iter i;
struct device * dev;
int error = 0;
#if defined(__VMKLNX__)
VMK_ASSERT(vmk_PreemptionIsEnabled() == VMK_FALSE);
#endif
if (!drv)
return -EINVAL;
klist_iter_init_node(&drv->klist_devices, &i,
start ? &start->knode_driver : NULL);
while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
klist_iter_exit(&i);
return error;
}
/* _VMKLNX_CODECHECK_: driver_find_device */
struct device * driver_find_device(struct device_driver *drv,
struct device * start, void * data,
int (*match)(struct device *, void *))
{
struct klist_iter i;
struct device *dev;
#if defined(__VMKLNX__)
VMK_ASSERT(vmk_PreemptionIsEnabled() == VMK_FALSE);
#endif
if (!drv)
return NULL;
klist_iter_init_node(&drv->klist_devices, &i,
(start ? &start->knode_driver : NULL));
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev))
break;
klist_iter_exit(&i);
return dev;
}
/**
* bus_find_device - device iterator for locating a particular device.
* @bus: bus type
* @start: Device to begin with
* @data: Data to pass to match function
* @match: Callback function to check device
*
* This is similar to the bus_for_each_dev() function above, but it
* returns a reference to a device that is 'found' for later use, as
* determined by the @match callback.
*
* The callback should return 0 if the device doesn't match and non-zero
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
struct device * bus_find_device(struct bus_type *bus,
struct device *start, void *data,
int (*match)(struct device *, void *))
{
struct klist_iter i;
struct device *dev;
printk(KERN_ERR "%s: == mydebug 000 data:%s\n", __FUNCTION__,data);
if (!bus)
return NULL;
printk(KERN_ERR "%s: == mydebug 001\n", __FUNCTION__);
klist_iter_init_node(&bus->klist_devices, &i,
(start ? &start->knode_bus : NULL));
printk(KERN_ERR "%s: == mydebug 002\n", __FUNCTION__);
while ((dev = next_device(&i)))
if (match(dev, data) && get_device(dev)){
printk(KERN_ERR "%s: == mydebug 003\n", __FUNCTION__);
break;
}
klist_iter_exit(&i);
return dev;
}
