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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30c7c4ca240sm14345291eec.4.2026.06.25.22.19.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jun 2026 22:19:48 -0700 (PDT) From: Zijun Hu Date: Thu, 25 Jun 2026 22:19:47 -0700 Subject: [PATCH v2 02/12] Bluetooth: btusb: Fix BD_ADDR byte order in btusb_set_bdaddr_wcn6855() Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260625-bt_bugfix-v2-2-93396a6f7d5e@oss.qualcomm.com> References: <20260625-bt_bugfix-v2-0-93396a6f7d5e@oss.qualcomm.com> In-Reply-To: <20260625-bt_bugfix-v2-0-93396a6f7d5e@oss.qualcomm.com> To: Marcel Holtmann , Luiz Augusto von Dentz , Rocky Liao , Bartosz Golaszewski , Ben Young Tae Kim , Balakrishna Godavarthi , Matthias Kaehlcke , Tim Jiang Cc: Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Luiz Augusto von Dentz , linux-arm-msm@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.3 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI2MDA0MCBTYWx0ZWRfX7rqqcae5W5EU SCfMQXNAoXtasHgdxd8Trj6q4wZzg24PWG8ISLQnxIt53xZv67VcDXMsSPdkepOuUK02iRCFFfC 8+wYLKi/uTDzk58+75EOkx/RlfXFEr4= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI2MDA0MCBTYWx0ZWRfXzVpmQWCuoLjT iZieKVafdoxt05CuqoGvpdt8N/sW0RqshIIYVhf+3GPo8bHTxr3hW+dZ/UkwSsCNa1yTX1dTaOU jNa5fpLw4bypwNx7xsL5sVzNkvFQcH1XowPD2ol+6JYxFG9yKkcf1U1H1cw3ImX160SgLwdw6fx Qo6FLjSUxkhLf0LTSZIqPIRtXLF8Lmj0bE5Nt6o+gazsmm0G7rAGh82gBItQT0pJjOncx+kwny0 8wj3c9MfF363Q2bmlMnClb7IQl2SzHl4Y8/06a6mK4s2bku/8suFE2zOHMwmgubYHeZQEJqKJX1 WqSIsYxk5Xa9UOFrTk27BZRvNPQmYGCMQUbVn233HMzQryEp58b1VZ8UBvqqA/WzgC1PyIQs3iT KJ4DajeC25rXkCgL7VubiTI4XSrBC1/SxLMXCyG15rKqO44kGpE3SKb/djPxIkvXFTNuChaWz3B 7M4oz/VWigNU45xW47Q== X-Proofpoint-GUID: m5XN_eIXiLCPcpybuNKGfdPXCaG9xeAC X-Proofpoint-ORIG-GUID: m5XN_eIXiLCPcpybuNKGfdPXCaG9xeAC X-Authority-Analysis: v=2.4 cv=AMxnnMPh c=1 sm=1 tr=0 ts=6a3e0bf6 cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=TYDuexqLZnRZS9vKGCYA:9 a=QEXdDO2ut3YA:10 a=scEy_gLbYbu1JhEsrz4S:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-26_01,2026-06-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 impostorscore=0 priorityscore=1501 phishscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606260040 btusb_set_bdaddr_wcn6855() sends the address without swapping byte order for VSC 0xFC14, but the command expects the address in reversed byte order compared to other HCI commands like HCI_Create_Connection, resulting in a wrong BD_ADDR being set. btmon log on WCN6855 shows VSC 0xFC14 is sent with swapped bytes 11 22 33 44 55 66, and Read BD ADDR returns the expected address 11:22:33:44:55:66: < HCI Command: Vendor (0x3f|0x0014) plen 6 #3 [hci0] 11 22 33 44 55 66 > HCI Event: Command Complete (0x0e) plen 4 #4 [hci0] Vendor (0x3f|0x0014) ncmd 1 Status: Success (0x00) < HCI Command: Read BD ADDR (0x04|0x0009) plen 0 #11 [hci0] > HCI Event: Command Complete (0x0e) plen 10 #12 [hci0] Read BD ADDR (0x04|0x0009) ncmd 1 Status: Success (0x00) Address: 11:22:33:44:55:66 (OUI 11-22-33) Fix by swapping the input address before issuing the command. Fixes: b40f58b97386 ("Bluetooth: btusb: Add Qualcomm Bluetooth SoC WCN6855 support") Signed-off-by: Zijun Hu --- drivers/bluetooth/btusb.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 7f14ce96319b..17573749adda 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3072,14 +3072,15 @@ static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev, static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev, const bdaddr_t *bdaddr) { + bdaddr_t bdaddr_swapped; struct sk_buff *skb; - u8 buf[6]; long ret; - memcpy(buf, bdaddr, sizeof(bdaddr_t)); + baswap(&bdaddr_swapped, bdaddr); - skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf, - HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); + skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(bdaddr_swapped), + &bdaddr_swapped, HCI_EV_CMD_COMPLETE, + HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { ret = PTR_ERR(skb); bt_dev_err(hdev, "Change address command failed (%ld)", ret); -- 2.34.1