wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate_mask()

stable inclusion
from stable-v6.12.42
category: bugfix
CVE: CVE-2025-39732

[ Upstream commit 65c12b1 ]

ath11k_mac_disable_peer_fixed_rate() is passed as the iterator to
ieee80211_iterate_stations_atomic(). Note in this case the iterator is
required to be atomic, however ath11k_mac_disable_peer_fixed_rate() does
not follow it as it might sleep. Consequently below warning is seen:

BUG: sleeping function called from invalid context at wmi.c:304
Call Trace:
 <TASK>
 dump_stack_lvl
 __might_resched.cold
 ath11k_wmi_cmd_send
 ath11k_wmi_set_peer_param
 ath11k_mac_disable_peer_fixed_rate
 ieee80211_iterate_stations_atomic
 ath11k_mac_op_set_bitrate_mask.cold

Change to ieee80211_iterate_stations_mtx() to fix this issue.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30

Fixes: d5c6515 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Link: https://patch.msgid.link/20250603-ath11k-use-non-atomic-iterator-v1-1-d75762068d56@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 9c0e3144924c7db701575a73af341d33184afeaf)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Conflicts:
	drivers/net/wireless/ath/ath11k/mac.c

Author: Baochen Qiang

drivers/net/wireless/ath/ath11k/mac.c

@@ -8214,9 +8214,9 @@ ath11k_mac_op_set_bitrate_mask(struct ieee80211_hw *hw,
 				    arvif->vdev_id, ret);
 			return ret;
 		}
-		ieee80211_iterate_stations_atomic(ar->hw,
-						  ath11k_mac_disable_peer_fixed_rate,
-						  arvif);
+		ieee80211_iterate_stations_mtx(ar->hw,
+					       ath11k_mac_disable_peer_fixed_rate,
+					       arvif);
 	} else if (ath11k_mac_bitrate_mask_get_single_nss(ar, band, mask,
 							  &single_nss)) {
 		rate = WMI_FIXED_RATE_NONE;
@@ -8285,9 +8285,9 @@ ath11k_mac_op_set_bitrate_mask(struct ieee80211_hw *hw,
 		}
 
 		mutex_lock(&ar->conf_mutex);
-		ieee80211_iterate_stations_atomic(ar->hw,
-						  ath11k_mac_disable_peer_fixed_rate,
-						  arvif);
+		ieee80211_iterate_stations_mtx(ar->hw,
+					       ath11k_mac_disable_peer_fixed_rate,
+					       arvif);
 
 		arvif->bitrate_mask = *mask;
 		ieee80211_iterate_stations_atomic(ar->hw,