From 8a75fc54745fd3ce9062ab1cc6429a9da9ac2a68 Mon Sep 17 00:00:00 2001 From: Rajkumar Manoharan Date: Wed, 2 Mar 2016 20:13:52 +0530 Subject: [PATCH] ath10k: fix firmware assert in monitor mode commit 166de3f1895d ("ath10k: remove supported chain mask") had revealed an issue on monitor mode. Configuring NSS upon monitor interface creation is causing target assert in all qca9888x and qca6174 firmware. Firmware assert issue can be reproduced by below sequence even after reverting commit 166de3f1895d ("ath10k: remove supported chain mask"). ip link set wlan0 down iw wlan0 set type monitor iw phy0 set antenna 7 ip link set wlan0 up This issue is originally reported on qca9888 with 10.1 firmware. Fixes: 5572a95b4b ("ath10k: apply chainmask settings to vdev on creation") Cc: stable@vger.kernel.org Reported-by: Janusz Dziedzic Signed-off-by: Rajkumar Manoharan Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 4a27f27a8e8b..ebff9c0a0784 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -4818,7 +4818,10 @@ static int ath10k_add_interface(struct ieee80211_hw *hw, goto err_vdev_delete; } - if (ar->cfg_tx_chainmask) { + /* Configuring number of spatial stream for monitor interface is causing + * target assert in qca9888 and qca6174. + */ + if (ar->cfg_tx_chainmask && (vif->type != NL80211_IFTYPE_MONITOR)) { u16 nss = get_nss_from_chainmask(ar->cfg_tx_chainmask); vdev_param = ar->wmi.vdev_param->nss; -- 2.34.1