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rt2x00: Fix sparse warning on nested container_of()

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Sparse produces warnings about nested contain_of() statements,
this means that lines like:
	interface_to_usbdev(to_usb_interface(rt2x00dev->dev));
will upset sparse.
Add a new macro to rt2x00usb.h which will convert to device
structure to the usb_device pointer in 2 steps to prevent this
sparse warning.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn 2008-06-16 19:57:11 +02:00 committed by John W. Linville
parent d74f5ba473
commit c1d35dfa0f
3 changed files with 10 additions and 8 deletions
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3
drivers/net/wireless/rt2x00/rt2500usb.c
View File

@ -1672,8 +1672,7 @@ static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
static int rt2500usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct rt2x00_dev *rt2x00dev = hw->priv;
struct usb_device *usb_dev =
interface_to_usbdev(to_usb_interface(rt2x00dev->dev));
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif);
struct queue_entry_priv_usb_bcn *bcn_priv;

9
drivers/net/wireless/rt2x00/rt2x00usb.c
View File

@ -40,8 +40,7 @@ int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
void *buffer, const u16 buffer_length,
const int timeout)
{
struct usb_device *usb_dev =
interface_to_usbdev(to_usb_interface(rt2x00dev->dev));
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
int status;
unsigned int i;
unsigned int pipe =
@ -162,8 +161,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
int rt2x00usb_write_tx_data(struct queue_entry *entry)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct usb_device *usb_dev =
interface_to_usbdev(to_usb_interface(rt2x00dev->dev));
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
struct skb_frame_desc *skbdesc;
u32 length;
@ -319,8 +317,7 @@ EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
struct queue_entry *entry)
{
struct usb_device *usb_dev =
interface_to_usbdev(to_usb_interface(rt2x00dev->dev));
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
usb_fill_bulk_urb(entry_priv->urb, usb_dev,

6
drivers/net/wireless/rt2x00/rt2x00usb.h
View File

@ -26,6 +26,12 @@
#ifndef RT2X00USB_H
#define RT2X00USB_H
#define to_usb_device_intf(d) \
({ \
struct usb_interface *intf = to_usb_interface(d); \
interface_to_usbdev(intf); \
})
/*
* This variable should be used with the
* usb_driver structure initialization.