From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
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 -1 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@xxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/mac.c | 2 +-
drivers/net/wireless/ath/ath9k/main.c | 3 +++
drivers/net/wireless/ath/ath9k/xmit.c | 7 +++++--
include/net/mac80211.h | 2 +-
net/mac80211/iface.c | 1 +
net/mac80211/main.c | 2 ++
6 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 289d03da14b2..c846f232e930 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -5906,7 +5906,7 @@ static int ath10k_mac_txpower_recalc(struct ath10k *ar)
lockdep_assert_held(&ar->conf_mutex);
list_for_each_entry(arvif, &ar->arvifs, list) {
- if (arvif->txpower <= 0)
+ if (arvif->txpower < 0) /* txpower not initialized yet? */
continue;
if (txpower == -1)
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 14f253199909..2edf70cf7e7e 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1196,6 +1196,9 @@ static void ath9k_tpc_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
int *power = data;
+ if (vif->bss_conf.txpower < 0)
+ return;
+
if (*power < vif->bss_conf.txpower)
*power = vif->bss_conf.txpower;
}
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 751d0d0550b5..82c592ca2cd2 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2114,10 +2114,13 @@ static void setup_frame_info(struct ieee80211_hw *hw,
if (tx_info->control.vif) {
struct ieee80211_vif *vif = tx_info->control.vif;
-
+ if (vif->bss_conf.txpower < 0)
+ goto nonvifpower;
txpower = 2 * vif->bss_conf.txpower;
} else {
- struct ath_softc *sc = hw->priv;
+ struct ath_softc *sc;
+ nonvifpower:
+ sc = hw->priv;
txpower = sc->cur_chan->cur_txpower;
}
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2b70b9268f76..db66520c5389 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -569,7 +569,7 @@ struct ieee80211_ftm_responder_params {
* @ssid: The SSID of the current vif. Valid in AP and IBSS mode.
* @ssid_len: Length of SSID given in @ssid.
* @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
- * @txpower: TX power in dBm
+ * @txpower: TX power in dBm. -1 means not configured.
* @txpower_type: TX power adjustment used to control per packet Transmit
* Power Control (TPC) in lower driver for the current vif. In particular
* TPC is enabled if value passed in %txpower_type is
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b0c2df6e22c5..49fcf9d80f85 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1459,6 +1459,7 @@ 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 = -1; /* unset */
sdata->noack_map = 0;
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index a148509a88bc..2f53188851ee 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -145,6 +145,8 @@ 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 < 0)
+ continue;
power = min(power, sdata->vif.bss_conf.txpower);
}
rcu_read_unlock();
--
2.20.1
