From: Julia Lawall <julia@diku.dk>
Date: Sun, 13 Dec 2009 05:47:04 +0000 (+0000)
Subject: drivers/net/usb: Correct code taking the size of a pointer
X-Git-Tag: firefly_0821_release~9833^2~3158^2~221
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6057912d7baad31be9819518674ffad349a065b1;p=firefly-linux-kernel-4.4.55.git

drivers/net/usb: Correct code taking the size of a pointer

sizeof(dev->dev_addr) is the size of a pointer.  A few lines above, the
size of this field is obtained using netdev->addr_len for a call to memcpy,
so do the same here.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression *x;
expression f;
type T;
@@

*f(...,(T)x,...)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
index b091e20ca167..f14d225404da 100644
--- a/drivers/net/usb/rtl8150.c
+++ b/drivers/net/usb/rtl8150.c
@@ -324,7 +324,7 @@ static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 		dbg("%02X:", netdev->dev_addr[i]);
 	dbg("%02X\n", netdev->dev_addr[i]);
 	/* Set the IDR registers. */
-	set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
+	set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 #ifdef EEPROM_WRITE
 	{
 	u8 cr;