From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130603221157.720285357@goodmis.org> Date: Mon, 03 Jun 2013 18:10:47 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chen Gang , "David S. Miller" Subject: [31/65] net: mac802154: comparision issue of type cast, finding by EXTRA_CFLAGS=-W References: <20130603221016.243553628@goodmis.org> Content-Disposition: inline; filename=0031-net-mac802154-comparision-issue-of-type-cast-finding.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.5 stable review patch. If anyone has any objections, please let me know. ------------------ From: Chen Gang [ Upstream commit 2c1bbbffa0b644fab4f91878cde0c2e8f52e2dcc ] Change MAC802154_CHAN_NONE from ~(u8)0 to 0xff, or the comparison in mac802154_wpan_xmit() for ``chan == MAC802154_CHAN_NONE'' will not succeed. This bug can be boiled down to ``u8 foo = 0xff; if (foo == ~(u8)0) [...] else [...]'' where the condition will always take the else branch. Signed-off-by: Chen Gang Signed-off-by: David S. Miller Signed-off-by: Steven Rostedt --- net/mac802154/mac802154.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h index a4dcaf1..703c121 100644 --- a/net/mac802154/mac802154.h +++ b/net/mac802154/mac802154.h @@ -90,7 +90,7 @@ struct mac802154_sub_if_data { #define MAC802154_MAX_XMIT_ATTEMPTS 3 -#define MAC802154_CHAN_NONE (~(u8)0) /* No channel is assigned */ +#define MAC802154_CHAN_NONE 0xff /* No channel is assigned */ extern struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced; extern struct ieee802154_mlme_ops mac802154_mlme_wpan; -- 1.7.10.4