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mac80211: tdls: disentangle HT supported conditions 

These conditions are rather difficult to follow, for example
because "!sta" only exists to not crash in the case that we
don't have a station pointer (WLAN_TDLS_SETUP_REQUEST) in
which the additional condition (peer supports HT) doesn't
actually matter anyway.

Cleaning this up only duplicates two lines of code but makes
the rest far easier to read, so do that.

As a side effect, smatch stops complaining about the lack of
a sta pointer test after the !sta (since the !sta goes away)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-01-23 11:42:14 +01:00
parent d6f5cc091b
commit c5309ba787
1 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
net/mac80211/tdls.c
View File

@ -345,24 +345,24 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
*/
sband = local->hw.wiphy->bands[band];
memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
action_code == WLAN_TDLS_SETUP_RESPONSE) &&
ht_cap.ht_supported && (!sta || sta->sta.ht_cap.ht_supported)) {
if (action_code == WLAN_TDLS_SETUP_REQUEST) {
if (action_code == WLAN_TDLS_SETUP_REQUEST && ht_cap.ht_supported) {
ieee80211_apply_htcap_overrides(sdata, &ht_cap);
/* disable SMPS in TDLS initiator */
ht_cap.cap |= (WLAN_HT_CAP_SM_PS_DISABLED
<< IEEE80211_HT_CAP_SM_PS_SHIFT);
} else {
ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
<< IEEE80211_HT_CAP_SM_PS_SHIFT;
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {
/* disable SMPS in TDLS responder */
sta->sta.ht_cap.cap |=
(WLAN_HT_CAP_SM_PS_DISABLED
<< IEEE80211_HT_CAP_SM_PS_SHIFT);
sta->sta.ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
<< IEEE80211_HT_CAP_SM_PS_SHIFT;
/* the peer caps are already intersected with our own */
memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap));
}
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);