diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2015-01-23 11:25:20 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-01-23 11:25:20 +0100 |
| commit | 13874e4b23de83899cc2d48011a98e42347c67cb (patch) | |
| tree | aa2ad92c3be430e2830da171cd3b7231ffb4c940 /net/wireless | |
| parent | 985e88b13a25599eeb46b03c123531a5a11ac1cd (diff) | |
| download | linux-13874e4b23de83899cc2d48011a98e42347c67cb.tar.gz | |
nl80211: suppress smatch warnings
smatch warns that we once checked request->ssids in two functions and then unconditionally used it later again. This is actually fine, because the code has a relationship between attrs[NL80211_ATTR_SCAN_SSIDS], n_ssids and request->ssids, but smatch isn't smart enough to realize that. Suppress the warnings by always checking just n_ssids - that way smatch won't know that request->ssids could be NULL, and since it is only NULL when n_ssids is 0 we still check everything correctly. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/nl80211.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 4542e8683beb..454d7a079d03 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5776,7 +5776,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) request->ssids = (void *)&request->channels[n_channels]; request->n_ssids = n_ssids; if (ie_len) { - if (request->ssids) + if (n_ssids) request->ie = (void *)(request->ssids + n_ssids); else request->ie = (void *)(request->channels + n_channels); @@ -5832,7 +5832,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) request->n_channels = i; i = 0; - if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { + if (n_ssids) { nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) { err = -EINVAL; @@ -6030,7 +6030,7 @@ nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev, request->ssids = (void *)&request->channels[n_channels]; request->n_ssids = n_ssids; if (ie_len) { - if (request->ssids) + if (n_ssids) request->ie = (void *)(request->ssids + n_ssids); else request->ie = (void *)(request->channels + n_channels); @@ -6039,7 +6039,7 @@ nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev, if (n_match_sets) { if (request->ie) request->match_sets = (void *)(request->ie + ie_len); - else if (request->ssids) + else if (n_ssids) request->match_sets = (void *)(request->ssids + n_ssids); else @@ -6098,7 +6098,7 @@ nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev, request->n_channels = i; i = 0; - if (attrs[NL80211_ATTR_SCAN_SSIDS]) { + if (n_ssids) { nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) { |