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

JIRA: https://issues.redhat.com/browse/RHEL-114889
CVE: CVE-2025-39732

commit 65c12b1
Author: Baochen Qiang <quic_bqiang@quicinc.com>
Date:   Tue Jun 3 10:25:28 2025 +0800

    wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate_mask()
    
    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: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>

Author: jtornosm

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

@@ -8744,9 +8744,9 @@ 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, arvif, band, mask,
 							  &single_nss)) {
 		rate = WMI_FIXED_RATE_NONE;
@@ -8813,9 +8813,9 @@ 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,