diff options
| author | Ben Greear <greearb@candelatech.com> | 2019-12-17 10:30:57 -0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2020-02-14 09:57:00 +0100 |
| commit | db6d9e9e8b48b7ab68c61553eb5fa68534dd0fde (patch) | |
| tree | 2c02017022b57c79419de37ea08522f32474008c /net/mac80211 | |
| parent | 9b125c27998719288e4dcf2faf54511039526692 (diff) | |
| download | linux-db6d9e9e8b48b7ab68c61553eb5fa68534dd0fde.tar.gz linux-db6d9e9e8b48b7ab68c61553eb5fa68534dd0fde.tar.bz2 linux-db6d9e9e8b48b7ab68c61553eb5fa68534dd0fde.zip | |
mac80211: Fix setting txpower to zero
With multiple VIFS ath10k, and probably others, tries to find the
minimum txpower for all vifs and uses that when setting txpower in
the firmware.
If a second vif is added and starts to scan, it's txpower is not
initialized yet and it set to zero.
ath10k had a patch to ignore zero values, but then it is impossible
to actually set txpower to zero.
So, instead initialize the txpower to INT_MIN in mac80211, and let
drivers know that means the power has not been set and so should
be ignored.
This should fix regression in:
commit 88407beb1b1462f706a1950a355fd086e1c450b6
Author: Ryan Hsu <ryanhsu@qca.qualcomm.com>
Date: Tue Dec 13 14:55:19 2016 -0800
ath10k: fix incorrect txpower set by P2P_DEVICE interface
Tested on ath10k 9984 with ath10k-ct firmware.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Link: https://lore.kernel.org/r/20191217183057.24586-1-greearb@candelatech.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/iface.c | 1 | ||||
| -rw-r--r-- | net/mac80211/main.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 2fb26bc105f8..3c00408e9c8c 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -1465,6 +1465,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, sdata->control_port_no_encrypt = false; sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; sdata->vif.bss_conf.idle = true; + sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ sdata->noack_map = 0; sdata->hw_80211_encap = false; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 265a31a8104d..cae3a34d3503 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -146,6 +146,8 @@ static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) continue; if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) continue; + if (sdata->vif.bss_conf.txpower == INT_MIN) + continue; power = min(power, sdata->vif.bss_conf.txpower); } rcu_read_unlock(); |