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mac80211: check channel context methods 

Verify that the channel context methods are
all assigned by the driver or not used.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-07-26 14:46:32 +02:00
parent e89a96f5cc
commit e269d8600a
1 changed files with 7 additions and 0 deletions
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7
net/mac80211/main.c
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@ -549,6 +549,13 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
return NULL;
/* check all or no channel context operations exist */
i = !!ops->add_chanctx + !!ops->remove_chanctx +
!!ops->change_chanctx + !!ops->assign_vif_chanctx +
!!ops->unassign_vif_chanctx;
if (WARN_ON(i != 0 && i != 5))
return NULL;
/* Ensure 32-byte alignment of our private data and hw private data.
* We use the wiphy priv data for both our ieee80211_local and for
* the driver's private data