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net: mac802154: comparision issue of type cast, finding by EXTRA_CFLAGS=-W

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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 <gang.chen@asianux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chen Gang 2013-04-25 00:49:55 +00:00 committed by David S. Miller
parent f7a1dd6e3a
commit 2c1bbbffa0
1 changed files with 1 additions and 1 deletions
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net/mac802154/mac802154.h
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@ -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;