mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
b1608d69cb
Commit b826291c, "drivercore/dt: add a match table pointer to struct
device" added an of_match pointer to struct device to cache the
of_match_table entry discovered at driver match time. This was unsafe
because matching is not an atomic operation with probing a driver. If
two or more drivers are attempted to be matched to a driver at the
same time, then the cached matching entry pointer could get
overwritten.
This patch reverts the of_match cache pointer and reworks all users to
call of_match_device() directly instead.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
#ifndef _LINUX_OF_DEVICE_H
|
|
#define _LINUX_OF_DEVICE_H
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of_platform.h> /* temporary until merge */
|
|
|
|
#ifdef CONFIG_OF_DEVICE
|
|
#include <linux/device.h>
|
|
#include <linux/of.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
extern const struct of_device_id *of_match_device(
|
|
const struct of_device_id *matches, const struct device *dev);
|
|
extern void of_device_make_bus_id(struct device *dev);
|
|
|
|
/**
|
|
* of_driver_match_device - Tell if a driver's of_match_table matches a device.
|
|
* @drv: the device_driver structure to test
|
|
* @dev: the device structure to match against
|
|
*/
|
|
static inline int of_driver_match_device(struct device *dev,
|
|
const struct device_driver *drv)
|
|
{
|
|
return of_match_device(drv->of_match_table, dev) != NULL;
|
|
}
|
|
|
|
extern struct platform_device *of_dev_get(struct platform_device *dev);
|
|
extern void of_dev_put(struct platform_device *dev);
|
|
|
|
extern int of_device_add(struct platform_device *pdev);
|
|
extern int of_device_register(struct platform_device *ofdev);
|
|
extern void of_device_unregister(struct platform_device *ofdev);
|
|
|
|
extern ssize_t of_device_get_modalias(struct device *dev,
|
|
char *str, ssize_t len);
|
|
|
|
extern int of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
|
|
|
|
static inline void of_device_node_put(struct device *dev)
|
|
{
|
|
of_node_put(dev->of_node);
|
|
}
|
|
|
|
#else /* CONFIG_OF_DEVICE */
|
|
|
|
static inline int of_driver_match_device(struct device *dev,
|
|
struct device_driver *drv)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int of_device_uevent(struct device *dev,
|
|
struct kobj_uevent_env *env)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void of_device_node_put(struct device *dev) { }
|
|
|
|
static inline const struct of_device_id *of_match_device(
|
|
const struct of_device_id *matches, const struct device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_OF_DEVICE */
|
|
|
|
#endif /* _LINUX_OF_DEVICE_H */
|