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authorJohannes Berg <johannes.berg@intel.com>2018-05-18 09:57:55 +0200
committerJohannes Berg <johannes.berg@intel.com>2018-05-18 11:14:35 +0200
commit73887fd906bb77a974fa02663df9937d0aff053a (patch)
tree9f2301560feb727cca41cb72fd8848dc302b7392 /net/mac80211
parent8689c051a20195b228e19acb155c7d6e48a86753 (diff)
downloadlinux-73887fd906bb77a974fa02663df9937d0aff053a.tar.bz2
cfg80211/mac80211: revert to stack allocation for sinfo
Arend's previous patch made the sinfo structure smaller again by to dynamically allocating the per-tid stats only when needed. Thus, revert to stack allocation for the struct to simplify the code. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/ethtool.c32
1 files changed, 13 insertions, 19 deletions
diff --git a/net/mac80211/ethtool.c b/net/mac80211/ethtool.c
index 09210aa8ea9a..2ba5686cbcab 100644
--- a/net/mac80211/ethtool.c
+++ b/net/mac80211/ethtool.c
@@ -71,15 +71,11 @@ static void ieee80211_get_stats(struct net_device *dev,
struct ieee80211_channel *channel;
struct sta_info *sta;
struct ieee80211_local *local = sdata->local;
- struct station_info *sinfo;
+ struct station_info sinfo;
struct survey_info survey;
int i, q;
#define STA_STATS_SURVEY_LEN 7
- sinfo = kmalloc(sizeof(*sinfo), GFP_KERNEL);
- if (!sinfo)
- return;
-
memset(data, 0, sizeof(u64) * STA_STATS_LEN);
#define ADD_STA_STATS(sta) \
@@ -90,8 +86,8 @@ static void ieee80211_get_stats(struct net_device *dev,
data[i++] += sta->rx_stats.fragments; \
data[i++] += sta->rx_stats.dropped; \
\
- data[i++] += sinfo->tx_packets; \
- data[i++] += sinfo->tx_bytes; \
+ data[i++] += sinfo.tx_packets; \
+ data[i++] += sinfo.tx_bytes; \
data[i++] += sta->status_stats.filtered; \
data[i++] += sta->status_stats.retry_failed; \
data[i++] += sta->status_stats.retry_count; \
@@ -111,8 +107,8 @@ static void ieee80211_get_stats(struct net_device *dev,
if (!(sta && !WARN_ON(sta->sdata->dev != dev)))
goto do_survey;
- memset(sinfo, 0, sizeof(*sinfo));
- sta_set_sinfo(sta, sinfo);
+ memset(&sinfo, 0, sizeof(sinfo));
+ sta_set_sinfo(sta, &sinfo);
i = 0;
ADD_STA_STATS(sta);
@@ -120,17 +116,17 @@ static void ieee80211_get_stats(struct net_device *dev,
data[i++] = sta->sta_state;
- if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))
+ if (sinfo.filled & BIT(NL80211_STA_INFO_TX_BITRATE))
data[i] = 100000ULL *
- cfg80211_calculate_bitrate(&sinfo->txrate);
+ cfg80211_calculate_bitrate(&sinfo.txrate);
i++;
- if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))
+ if (sinfo.filled & BIT(NL80211_STA_INFO_RX_BITRATE))
data[i] = 100000ULL *
- cfg80211_calculate_bitrate(&sinfo->rxrate);
+ cfg80211_calculate_bitrate(&sinfo.rxrate);
i++;
- if (sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))
- data[i] = (u8)sinfo->signal_avg;
+ if (sinfo.filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))
+ data[i] = (u8)sinfo.signal_avg;
i++;
} else {
list_for_each_entry(sta, &local->sta_list, list) {
@@ -138,16 +134,14 @@ static void ieee80211_get_stats(struct net_device *dev,
if (sta->sdata->dev != dev)
continue;
- memset(sinfo, 0, sizeof(*sinfo));
- sta_set_sinfo(sta, sinfo);
+ memset(&sinfo, 0, sizeof(sinfo));
+ sta_set_sinfo(sta, &sinfo);
i = 0;
ADD_STA_STATS(sta);
}
}
do_survey:
- kfree(sinfo);
-
i = STA_STATS_LEN - STA_STATS_SURVEY_LEN;
/* Get survey stats for current channel */
survey.filled = 0;