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From a17d93ff3a950fefaea40e4a4bf3669b9137c533 Mon Sep 17 00:00:00 2001
From: Ben Greear <greearb@candelatech.com>
Date: Wed, 14 Dec 2016 11:30:38 -0800
Subject: [PATCH] mac80211: fix legacy and invalid rx-rate report
This fixes obtaining the rate info via sta_set_sinfo
when the rx rate is invalid (for instance, on IBSS
interface that has received no frames from one of its
peers).
Also initialize rinfo->flags for legacy rates, to not
rely on the whole sinfo being initialized to zero.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
net/mac80211/sta_info.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1975,6 +1975,7 @@ static void sta_stats_decode_rate(struct
u16 brate;
unsigned int shift;
+ rinfo->flags = 0;
sband = local->hw.wiphy->bands[(rate >> 4) & 0xf];
brate = sband->bitrates[rate & 0xf].bitrate;
if (rinfo->bw == RATE_INFO_BW_5)
@@ -1990,14 +1991,15 @@ static void sta_stats_decode_rate(struct
rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
}
-static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
+static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
{
u16 rate = ACCESS_ONCE(sta_get_last_rx_stats(sta)->last_rate);
if (rate == STA_STATS_RATE_INVALID)
- rinfo->flags = 0;
- else
- sta_stats_decode_rate(sta->local, rate, rinfo);
+ return -EINVAL;
+
+ sta_stats_decode_rate(sta->local, rate, rinfo);
+ return 0;
}
static void sta_set_tidstats(struct sta_info *sta,
@@ -2202,8 +2204,8 @@ void sta_set_sinfo(struct sta_info *sta,
}
if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
- sta_set_rate_info_rx(sta, &sinfo->rxrate);
- sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
+ if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
+ sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
}
sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
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