linux-kernel - [PATCH] net/e1000: fix memcpy in e1000_get

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Date:	Thu, 29 Nov 2007 02:54:11 +0100
From:	Roel Kluin <12o3l@...cali.nl>
To:	"Kok, Auke" <auke-jan.h.kok@...el.com>,
	lkml <linux-kernel@...r.kernel.org>
CC:	e1000-devel@...ts.sourceforge.net
Subject: [PATCH] net/e1000: fix memcpy  in e1000_get_strings

drivers/net/e1000/e1000_ethtool.c:113:
#define E1000_TEST_LEN sizeof(e1000_gstrings_test) / ETH_GSTRING_LEN

drivers/net/e1000e/ethtool.c:106:
#define E1000_TEST_LEN sizeof(e1000_gstrings_test) / ETH_GSTRING_LEN

E1000_TEST_LEN*ETH_GSTRING_LEN will expand to 
sizeof(e1000_gstrings_test) / (ETH_GSTRING_LEN * ETH_GSTRING_LEN)

Please confirm that the change is as wanted.
--
A lack of parentheses around defines causes unexpected results due to operator
precedences.

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 667f18b..b83ccce 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -1923,7 +1923,7 @@ e1000_get_strings(struct net_device *netdev, uint32_t stringset, uint8_t *data)
 	switch (stringset) {
 	case ETH_SS_TEST:
 		memcpy(data, *e1000_gstrings_test,
-			E1000_TEST_LEN*ETH_GSTRING_LEN);
+			sizeof(e1000_gstrings_test));
 		break;
 	case ETH_SS_STATS:
 		for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 6a39784..338c49d 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -1739,7 +1739,7 @@ static void e1000_get_strings(struct net_device *netdev, u32 stringset,
 	switch (stringset) {
 	case ETH_SS_TEST:
 		memcpy(data, *e1000_gstrings_test,
-			E1000_TEST_LEN*ETH_GSTRING_LEN);
+				sizeof(e1000_gstrings_test));
 		break;
 	case ETH_SS_STATS:
 		for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
-
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