diff options
| author | Luciano Coelho | 2012-06-18 15:52:51 +0300 |
|---|---|---|
| committer | Johannes Berg | 2012-06-20 10:54:23 +0200 |
| commit | 6df653c71e8168e1df01118cc85cd84d0deeb583 (patch) | |
| tree | f1a05e10a875eeff275bb7256fa06ced3ced0842 | |
| parent | 559cef996d2e4c9b652a53bb3a53e5787e247f57 (diff) | |
mac80211: initialize sta pointer to avoid false-positive warning
Some compilers (eg. gcc 4.4.1 for ARM) report a false positive warning
in mlme.c:
net/mac80211/mlme.c: In function 'ieee80211_prep_connection':
net/mac80211/mlme.c:3035: warning: 'sta' may be used uninitialized in this function
This is a false positive because the place where 'sta' is used is
inside an if with the same condition of where it is set:
[...]
if (!have_sta) {
sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
if (!sta)
return -ENOMEM;
}
[...]
if (!have_sta) {
[...]
sta->sta.supp_rates[cbss->channel->band] = rates;
[...]
For some reason the compiler doesn't understand this and warns.
While this is not a problem in the code itself, we can avoid polluting
the build logs with false positives by setting sta to NULL on
declaration and checking for sta instead of !have_sta in the second if.
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/mac80211/mlme.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 0f45d02e0ba7..fa927c6aa14b 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -3012,7 +3012,7 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_bss *bss = (void *)cbss->priv; - struct sta_info *sta; + struct sta_info *sta = NULL; bool have_sta = false; int err; int ht_cfreq; @@ -3102,7 +3102,7 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, local->oper_channel = cbss->channel; ieee80211_hw_config(local, 0); - if (!have_sta) { + if (sta) { u32 rates = 0, basic_rates = 0; bool have_higher_than_11mbit; int min_rate = INT_MAX, min_rate_index = -1; |