int ams_input_init(void) { if (joystick) ams_input_enable(); return device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick); }
static ssize_t ams_input_store_joystick(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { unsigned long enable; int error = 0; int ret; ret = kstrtoul(buf, 0, &enable); if (ret) return ret; if (enable > 1) return -EINVAL; mutex_lock(&ams_input_mutex); if (enable != joystick) { if (enable) error = ams_input_enable(); else ams_input_disable(); } mutex_unlock(&ams_input_mutex); return error ? error : count; }
/* Call with ams_info.lock held! */ int ams_input_init(void) { int result; result = device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick); if (!result && joystick) ams_input_enable(); return result; }
static ssize_t ams_input_store_joystick(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { if (sscanf(buf, "%d\n", &joystick) != 1) return -EINVAL; mutex_lock(&ams_info.lock); if (joystick) ams_input_enable(); else ams_input_disable(); mutex_unlock(&ams_info.lock); return count; }