linux-kernel - Re: p80211wext.c: problem with IW_ENCODE_ALG

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Date:	Tue, 5 May 2009 15:47:06 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	richard@....demon.co.uk, gregkh@...e.de,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: p80211wext.c: problem with IW_ENCODE_ALG_WEP

From: Julia Lawall <julia@...u.dk>

The expression !(ext->alg & IW_ENCODE_ALG_WEP) appears to be incorrect,
because there are several possible values for ext->alg that give 1 when
bit-anded with IW_ENCODE_ALG_WEP.  Therefore Richard Kennedy suggested to
rewrite the code with !=

Added \n at the end of the debug string as well.

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/staging/wlan-ng/p80211wext.c           |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wlan-ng/p80211wext.c b/drivers/staging/wlan-ng/p80211wext.c
index 96078b0..74eac34 100644
--- a/drivers/staging/wlan-ng/p80211wext.c
+++ b/drivers/staging/wlan-ng/p80211wext.c
@@ -1487,8 +1487,8 @@ static int p80211wext_set_encodeext(struct net_device *dev,
 	}
 
 	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
-		if (!(ext->alg & IW_ENCODE_ALG_WEP)) {
-			pr_debug("asked to set a non wep key :(");
+		if (ext->alg != IW_ENCODE_ALG_WEP) {
+			pr_debug("asked to set a non wep key :(\n");
 			return -EINVAL;
 		}
 		if (idx) {
--
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