[PATCH ath-next v2] wifi: ath12k: Validate peer_id before searching for peer

[Nagarajan Maran]

From: Sriram R <quic_srirrama at quicinc.com>

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 at quicinc.com>
Signed-off-by: Nagarajan Maran <nagarajan.maran at oss.qualcomm.com>
---
Changes in v2:
	- Corrected Signed-off-by tag
---
 drivers/net/wireless/ath/ath12k/peer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/peer.c b/drivers/net/wireless/ath/ath12k/peer.c
index ec7236bbccc0..1a098cb22933 100644
--- a/drivers/net/wireless/ath/ath12k/peer.c
+++ b/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);
 

base-commit: 7e22b60a8af12b81ff3d416ed4e7d21fb98e9f25
-- 
2.34.1