From 4fdbc67a25ce577b79b3af595e874e9ef921329f Mon Sep 17 00:00:00 2001
From: Maxim Altshul <maxim.altshul@ti.com>
Date: Thu, 11 Aug 2016 13:38:16 +0300
Subject: [PATCH] mac80211: call get_expected_throughput only after adding
station
Depending on which method the driver implements, userspace could
call this (indirectly, by getting station info) before the driver
knows about the station, possibly causing it to misbehave.
Therefore, add a check for sta->uploaded which indicates that the
driver knows about the station.
Signed-off-by: Maxim Altshul <maxim.altshul@ti.com>
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
net/mac80211/driver-ops.h | 8 ++++----
net/mac80211/sta_info.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index ba5fc1f01e53..42a41ae405ba 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -1088,13 +1088,13 @@ static inline void drv_leave_ibss(struct ieee80211_local *local,
}
static inline u32 drv_get_expected_throughput(struct ieee80211_local *local,
- struct ieee80211_sta *sta)
+ struct sta_info *sta)
{
u32 ret = 0;
- trace_drv_get_expected_throughput(sta);
- if (local->ops->get_expected_throughput)
- ret = local->ops->get_expected_throughput(&local->hw, sta);
+ trace_drv_get_expected_throughput(&sta->sta);
+ if (local->ops->get_expected_throughput && sta->uploaded)
+ ret = local->ops->get_expected_throughput(&local->hw, &sta->sta);
trace_drv_return_u32(local, ret);
return ret;
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index d1cba819e19a..19f14c907d74 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2301,7 +2301,7 @@ u32 sta_get_expected_throughput(struct sta_info *sta)
if (ref && ref->ops->get_expected_throughput)
thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
else
- thr = drv_get_expected_throughput(local, &sta->sta);
+ thr = drv_get_expected_throughput(local, sta);
return thr;
}
--
2.50.1