diff options
| -rw-r--r-- | drivers/usb/atm/cxacru.c | 48 | ||||
| -rw-r--r-- | drivers/usb/atm/usbatm.c | 1 | ||||
| -rw-r--r-- | drivers/usb/atm/usbatm.h | 15 |
3 files changed, 44 insertions, 20 deletions
diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c index 8da4a06bf140..4bead3da3850 100644 --- a/drivers/usb/atm/cxacru.c +++ b/drivers/usb/atm/cxacru.c @@ -200,9 +200,12 @@ static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \ static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ - struct usb_interface *intf = to_usb_interface(dev); \ - struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \ - struct cxacru_data *instance = usbatm_instance->driver_data; \ + struct cxacru_data *instance = to_usbatm_driver_data(\ + to_usb_interface(dev)); \ +\ + if (instance == NULL) \ + return -ENODEV; \ +\ return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \ } \ CXACRU__ATTR_INIT(_name) @@ -288,22 +291,28 @@ static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf) static ssize_t cxacru_sysfs_show_mac_address(struct device *dev, struct device_attribute *attr, char *buf) { - struct usb_interface *intf = to_usb_interface(dev); - struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); - struct atm_dev *atm_dev = usbatm_instance->atm_dev; + struct cxacru_data *instance = to_usbatm_driver_data( + to_usb_interface(dev)); - return snprintf(buf, PAGE_SIZE, "%pM\n", atm_dev->esi); + if (instance == NULL || instance->usbatm->atm_dev == NULL) + return -ENODEV; + + return snprintf(buf, PAGE_SIZE, "%pM\n", + instance->usbatm->atm_dev->esi); } static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev, struct device_attribute *attr, char *buf) { - struct usb_interface *intf = to_usb_interface(dev); - struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); - struct cxacru_data *instance = usbatm_instance->driver_data; - u32 value = instance->card_info[CXINF_LINE_STARTABLE]; - static char *str[] = { "running", "stopped" }; + struct cxacru_data *instance = to_usbatm_driver_data( + to_usb_interface(dev)); + u32 value; + + if (instance == NULL) + return -ENODEV; + + value = instance->card_info[CXINF_LINE_STARTABLE]; if (unlikely(value >= ARRAY_SIZE(str))) return snprintf(buf, PAGE_SIZE, "%u\n", value); return snprintf(buf, PAGE_SIZE, "%s\n", str[value]); @@ -312,9 +321,8 @@ static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev, static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct usb_interface *intf = to_usb_interface(dev); - struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); - struct cxacru_data *instance = usbatm_instance->driver_data; + struct cxacru_data *instance = to_usbatm_driver_data( + to_usb_interface(dev)); int ret; int poll = -1; char str_cmd[8]; @@ -328,13 +336,16 @@ static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev, return -EINVAL; ret = 0; + if (instance == NULL) + return -ENODEV; + if (mutex_lock_interruptible(&instance->adsl_state_serialize)) return -ERESTARTSYS; if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) { ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0); if (ret < 0) { - atm_err(usbatm_instance, "change adsl state:" + atm_err(instance->usbatm, "change adsl state:" " CHIP_ADSL_LINE_STOP returned %d\n", ret); ret = -EIO; @@ -354,7 +365,7 @@ static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev, if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) { ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0); if (ret < 0) { - atm_err(usbatm_instance, "change adsl state:" + atm_err(instance->usbatm, "change adsl state:" " CHIP_ADSL_LINE_START returned %d\n", ret); ret = -EIO; @@ -649,9 +660,6 @@ static int cxacru_atm_start(struct usbatm_data *usbatm_instance, { struct cxacru_data *instance = usbatm_instance->driver_data; struct usb_interface *intf = usbatm_instance->usb_intf; - /* - struct atm_dev *atm_dev = usbatm_instance->atm_dev; - */ int ret; int start_polling = 1; diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c index fbea8563df1e..40380434ba96 100644 --- a/drivers/usb/atm/usbatm.c +++ b/drivers/usb/atm/usbatm.c @@ -1333,6 +1333,7 @@ void usbatm_usb_disconnect(struct usb_interface *intf) if (instance->atm_dev) { sysfs_remove_link(&instance->atm_dev->class_dev.kobj, "device"); atm_dev_deregister(instance->atm_dev); + instance->atm_dev = NULL; } usbatm_put_instance(instance); /* taken in usbatm_usb_probe */ diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h index f6f4508a9d42..0863f85fcc26 100644 --- a/drivers/usb/atm/usbatm.h +++ b/drivers/usb/atm/usbatm.h @@ -204,4 +204,19 @@ struct usbatm_data { struct urb *urbs[0]; }; +static inline void *to_usbatm_driver_data(struct usb_interface *intf) +{ + struct usbatm_data *usbatm_instance; + + if (intf == NULL) + return NULL; + + usbatm_instance = usb_get_intfdata(intf); + + if (usbatm_instance == NULL) /* set NULL before unbind() */ + return NULL; + + return usbatm_instance->driver_data; /* set NULL after unbind() */ +} + #endif /* _USBATM_H_ */ |