Replacing accesses to dev->priv to netdev_priv(dev). The replacment
is safe when netdev_priv is used to access a private structure that is
right next to the net_device structure in memory. Cf
http://groups.google.com/group/comp.os.linux.development.system/browse_thread/thread/de19321bcd94dbb8/0d74a4adcd6177bd
This is the case when the net_device structure was allocated with
a call to alloc_netdev or one of its derivative.
Here is an excerpt of the semantic patch that performs the transformation
@ rule1 @
type T;
struct net_device *dev;
@@
dev =
(
alloc_netdev
|
alloc_etherdev
|
alloc_trdev
)
(sizeof(T), ...)
@ rule1bis @
struct net_device *dev;
expression E;
@@
dev->priv = E
@ rule2 depends on rule1 && !rule1bis @
struct net_device *dev;
type rule1.T;
@@
- (T*) dev->priv
+ netdev_priv(dev)
Signed-off-by: Yoann Padioleau <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
drivers/net/usb/mcs7830.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/mcs7830.c b/drivers/net/usb/mcs7830.c
index 6240b97..37ad14b 100644
--- a/drivers/net/usb/mcs7830.c
+++ b/drivers/net/usb/mcs7830.c
@@ -341,14 +341,14 @@ out:
static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
int location)
{
- struct usbnet *dev = netdev->priv;
+ struct usbnet *dev = netdev_priv(netdev);
return mcs7830_read_phy(dev, location);
}
static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
int location, int val)
{
- struct usbnet *dev = netdev->priv;
+ struct usbnet *dev = netdev_priv(netdev);
mcs7830_write_phy(dev, location, val);
}
-
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