diff options
| -rw-r--r-- | drivers/base/driver.c | 75 | ||||
| -rw-r--r-- | include/linux/device/driver.h | 2 |
2 files changed, 0 insertions, 77 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index c5ebf1fdad75..5d9c39081339 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -31,81 +31,6 @@ static struct device *next_device(struct klist_iter *i) } /** - * driver_set_override() - Helper to set or clear driver override. - * @dev: Device to change - * @override: Address of string to change (e.g. &device->driver_override); - * The contents will be freed and hold newly allocated override. - * @s: NUL-terminated string, new driver name to force a match, pass empty - * string to clear it ("" or "\n", where the latter is only for sysfs - * interface). - * @len: length of @s - * - * Helper to set or clear driver override in a device, intended for the cases - * when the driver_override field is allocated by driver/bus code. - * - * Returns: 0 on success or a negative error code on failure. - */ -int driver_set_override(struct device *dev, const char **override, - const char *s, size_t len) -{ - const char *new, *old; - char *cp; - - if (!override || !s) - return -EINVAL; - - /* - * The stored value will be used in sysfs show callback (sysfs_emit()), - * which has a length limit of PAGE_SIZE and adds a trailing newline. - * Thus we can store one character less to avoid truncation during sysfs - * show. - */ - if (len >= (PAGE_SIZE - 1)) - return -EINVAL; - - /* - * Compute the real length of the string in case userspace sends us a - * bunch of \0 characters like python likes to do. - */ - len = strlen(s); - - if (!len) { - /* Empty string passed - clear override */ - device_lock(dev); - old = *override; - *override = NULL; - device_unlock(dev); - kfree(old); - - return 0; - } - - cp = strnchr(s, len, '\n'); - if (cp) - len = cp - s; - - new = kstrndup(s, len, GFP_KERNEL); - if (!new) - return -ENOMEM; - - device_lock(dev); - old = *override; - if (cp != s) { - *override = new; - } else { - /* "\n" passed - clear override */ - kfree(new); - *override = NULL; - } - device_unlock(dev); - - kfree(old); - - return 0; -} -EXPORT_SYMBOL_GPL(driver_set_override); - -/** * driver_for_each_device - Iterator for devices bound to a driver. * @drv: Driver we're iterating. * @start: Device to begin with diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h index 2fb054868049..38048e74d10a 100644 --- a/include/linux/device/driver.h +++ b/include/linux/device/driver.h @@ -160,8 +160,6 @@ int __must_check driver_create_file(const struct device_driver *driver, void driver_remove_file(const struct device_driver *driver, const struct driver_attribute *attr); -int driver_set_override(struct device *dev, const char **override, - const char *s, size_t len); int __must_check driver_for_each_device(struct device_driver *drv, struct device *start, void *data, device_iter_t fn); struct device *driver_find_device(const struct device_driver *drv, |