wifi: ath12k: Validate peer_id before searching for peer

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

commit 136aad1
Author: Sriram R <quic_srirrama@quicinc.com>
Date:   Mon Jul 14 16:44:38 2025 +0530

    wifi: ath12k: Validate peer_id before searching for peer
    
    In RX WBM error path, error packet is received with invalid
    peer_id (0x3FFF) as there is no peer associated with that packet.
    However, this invalid peer_id coincides with the ML peer_id valid
    bit mask, causing an unnecessary search in the ML peer list.
    
    Prevent searching the peer list for invalid peer_id and return NULL.
    
    Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
    
    Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
    Signed-off-by: Nagarajan Maran <nagarajan.maran@oss.qualcomm.com>
    Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
    Link: https://patch.msgid.link/20250714111438.1134438-1-nagarajan.maran@oss.qualcomm.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/ath12k/peer.c

@@ -100,6 +100,9 @@ struct ath12k_peer *ath12k_peer_find_by_id(struct ath12k_base *ab,
 
 	lockdep_assert_held(&ab->base_lock);
 
+	if (peer_id == HAL_INVALID_PEERID)
+		return NULL;
+
 	if (peer_id & ATH12K_PEER_ML_ID_VALID)
 		return ath12k_peer_find_by_ml_id(ab, peer_id);