[PATCH] wifi: ath12k: fix MAC address copy on big endian

[Alexander Wilhelm]

The ath12k_dp_get_mac_addr function performs a simple memcpy from a
CPU-native data types into an u8 array. On a big-endian architecture, this
later results in a null‑pointer dereference. Convert the data to
little‑endian first, then copy it into the target array.

Signed-off-by: Alexander Wilhelm <alexander.wilhelm@xxxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath12k/dp.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h
index f8cfc7bb29dd..50957915dbf4 100644
--- a/drivers/net/wireless/ath/ath12k/dp.h
+++ b/drivers/net/wireless/ath/ath12k/dp.h
@@ -647,8 +647,11 @@ int ath12k_dp_arch_rx_tid_delete_handler(struct ath12k_dp *dp,
 
 static inline void ath12k_dp_get_mac_addr(u32 addr_l32, u16 addr_h16, u8 *addr)
 {
-	memcpy(addr, &addr_l32, 4);
-	memcpy(addr + 4, &addr_h16, ETH_ALEN - 4);
+	__le32 le_addr_l32 = cpu_to_le32(addr_l32);
+	__le16 le_addr_h16 = cpu_to_le16(addr_h16);
+
+	memcpy(addr, &le_addr_l32, 4);
+	memcpy(addr + 4, &le_addr_h16, ETH_ALEN - 4);
 }
 
 static inline struct ath12k_dp *

---
base-commit: 702847e8cfd51856836a282db2073defd7cfd80c
change-id: 20260317-fix-mac-addr-copy-on-big-endian-f1a4fea40184

Best regards,
-- 
Alexander Wilhelm <alexander.wilhelm@xxxxxxxxxxxx>