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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31174ae6cd9sm74577772eec.31.2026.07.13.05.01.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 05:01:12 -0700 (PDT) From: Zijun Hu Date: Mon, 13 Jul 2026 05:01:11 -0700 Subject: [PATCH v2 1/5] Bluetooth: coredump: Introduce and apply hci_devcd_state_name() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260713-btusb_prep_qcc2072-v2-1-bbcb651285f2@oss.qualcomm.com> References: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> In-Reply-To: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> To: Marcel Holtmann , Luiz Augusto von Dentz Cc: Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.3 X-Authority-Analysis: v=2.4 cv=Oq9/DS/t c=1 sm=1 tr=0 ts=6a54d38a cx=c_pps a=Oh5Dbbf/trHjhBongsHeRQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=-o8gAGCozA265rLodYYA:9 a=QEXdDO2ut3YA:10 a=_Vgx9l1VpLgwpw_dHYaR:22 X-Proofpoint-ORIG-GUID: 52RnBgqE4hF63sp7tG6uv-6Ni4x8EWI0 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfX+wC84H4RXh8s KLYyd/mDhOkI0wEdvCW2Ni2wKyLIsVm916NRwTFgVgAi7W0YZ0zTmGN5tkX6L9U0IXyE97klRSE xq480JcTxSzgLgAGx4EWPwYwKJqHgVs= X-Proofpoint-GUID: 52RnBgqE4hF63sp7tG6uv-6Ni4x8EWI0 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfX78eBHb1m1/BB QKzQuZbiTiU6C4l4rhVMjGWEANo56Asc+UFlrwI6w8zsNLl6yXJ132CN0UdsPzkYk4DFwwnaK/m riGIRLl1BEfxUt4LSpu5iR4GQKUQZk80xFk94umk2YQ0vUMUWFUuHqv1u6rv/UxeRQx8l80RLwW SpsmOCJaIJ8w40M4V21G/ZEOj5NVALcpw9E3hCtKy4PckIaavsmfyCxoMddP9gt4VW8eRrEJORk 8Yb3gC2BaAwl70fu3tebw9+0ws1TQUVhXkXax8u23a8ZYGKM6kHcd7WnsLwkzQ+3y9WoKxLL2Dt GKMVXoel19ZBav4WweDKVpOdtkwj98g5tMwkvqVN3nKF6oBKODXAkDHbfi1A5uUv72FsXZDgMqM p3VjtfnbuuPgZkrJFGUOqYeQZ01IqtZYDfjqZIsvJOyAoh46XGqs8+ZeyGf5+6njOiggG7xb1Pj kLNvrBVQksg4BOhfT7w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-13_02,2026-07-10_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 spamscore=0 malwarescore=0 bulkscore=0 adultscore=0 clxscore=1015 phishscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607130125 Introduce hci_devcd_state_name() to make devcoredump state more readable, and apply it in coredump.c. Also remove a trailing space in two bt_dev_dbg() format strings while applying it. Signed-off-by: Zijun Hu --- include/net/bluetooth/coredump.h | 7 +++++++ net/bluetooth/coredump.c | 45 +++++++++++++++++++++++++++++++++---= ---- 2 files changed, 45 insertions(+), 7 deletions(-) diff --git a/include/net/bluetooth/coredump.h b/include/net/bluetooth/cored= ump.h index 72f51b587a04..ab85a6adfffd 100644 --- a/include/net/bluetooth/coredump.h +++ b/include/net/bluetooth/coredump.h @@ -60,6 +60,8 @@ struct hci_devcoredump { =20 #ifdef CONFIG_DEV_COREDUMP =20 +const char *hci_devcd_state_name(enum devcoredump_state state); + void hci_devcd_reset(struct hci_dev *hdev); void hci_devcd_rx(struct work_struct *work); void hci_devcd_timeout(struct work_struct *work); @@ -74,6 +76,11 @@ int hci_devcd_abort(struct hci_dev *hdev); =20 #else =20 +static inline const char *hci_devcd_state_name(enum devcoredump_state stat= e) +{ + return ""; +} + static inline void hci_devcd_reset(struct hci_dev *hdev) {} static inline void hci_devcd_rx(struct work_struct *work) {} static inline void hci_devcd_timeout(struct work_struct *work) {} diff --git a/net/bluetooth/coredump.c b/net/bluetooth/coredump.c index c0f027fab583..913bbba559f8 100644 --- a/net/bluetooth/coredump.c +++ b/net/bluetooth/coredump.c @@ -30,8 +30,9 @@ struct hci_devcoredump_skb_pattern { =20 #define DBG_UNEXPECTED_STATE() \ bt_dev_dbg(hdev, \ - "Unexpected packet (%d) for state (%d). ", \ - hci_dmp_cb(skb)->pkt_type, hdev->dump.state) + "Unexpected packet (%d) for state %s.", \ + hci_dmp_cb(skb)->pkt_type, \ + hci_devcd_state_name(hdev->dump.state)) =20 #define MAX_DEVCOREDUMP_HDR_SIZE 512 /* bytes */ =20 @@ -50,8 +51,9 @@ static int hci_devcd_update_hdr_state(char *buf, size_t s= ize, int state) /* Call with hci_dev_lock only. */ static int hci_devcd_update_state(struct hci_dev *hdev, int state) { - bt_dev_dbg(hdev, "Updating devcoredump state from %d to %d.", - hdev->dump.state, state); + bt_dev_dbg(hdev, "Updating devcoredump state from %s to %s.", + hci_devcd_state_name(hdev->dump.state), + hci_devcd_state_name(state)); =20 hdev->dump.state =3D state; =20 @@ -245,7 +247,7 @@ static void hci_devcd_dump(struct hci_dev *hdev) struct sk_buff *skb; u32 size; =20 - bt_dev_dbg(hdev, "state %d", hdev->dump.state); + bt_dev_dbg(hdev, "state %s", hci_devcd_state_name(hdev->dump.state)); =20 size =3D hdev->dump.tail - hdev->dump.head; =20 @@ -368,8 +370,9 @@ void hci_devcd_rx(struct work_struct *work) break; =20 default: - bt_dev_dbg(hdev, "Unknown packet (%d) for state (%d). 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31174ae6cd9sm74577772eec.31.2026.07.13.05.01.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 05:01:13 -0700 (PDT) From: Zijun Hu Date: Mon, 13 Jul 2026 05:01:12 -0700 Subject: [PATCH v2 2/5] Bluetooth: coredump: Allow drivers to pad dump header to fixed size Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260713-btusb_prep_qcc2072-v2-2-bbcb651285f2@oss.qualcomm.com> References: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> In-Reply-To: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> To: Marcel Holtmann , Luiz Augusto von Dentz Cc: Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.3 X-Proofpoint-GUID: 1xapAga2RfHG6Pmrfxjgj97Er437aRL9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfXy+/xZr3PaE1J 9/5uMBuin1gCs9soO1/2vaVvKb8acKCtsPhs5+HrgZSwdHgZr9qI7nhoVzYOn+Y0QffoP2w4G/l +gw7EDfBQEs6lfp5u8n/c4Va4mNats/pLrsEfuk+32Km7WipjMn78/7HibHMtyj3cL/NjWgmNIa DnYdEW27PvPDSvd0RZtnr+ugBlwWX18j+yZcvj1SUgD4kfM77MA3P62N3B4qrQpbjWRDWpn/hX+ zxZ6T51/cJETo5rs15VlTR6petAstAvuWPF0+poaRBkomktjH/Cag1kN9L4r9cOnFrgxObFD9ct yhGVq99q3ozGmk9ps4DPPxT1kkdol/Gaydk+NHKabv0nTpwGj4Hzf6TJKSq3CTOTt9/Kmj22FTt qYFbgkQhCd34anOTlQFPYXbQzAOqfwEKPF+qetrcPrsBY3PekA6hh/fO4ingxXR+qjcNVlsrRuf XZ6QZH6XK6yUV8pVp/A== X-Proofpoint-ORIG-GUID: 1xapAga2RfHG6Pmrfxjgj97Er437aRL9 X-Authority-Analysis: v=2.4 cv=dZSwG3Xe c=1 sm=1 tr=0 ts=6a54d38b cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=yQAzOZDq_a3C0jIT-HgA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfX0IGCArnlS9Qq JOT01wrUz+zXJ0xxU2sPHFMOAOeB0ahbw54fnJanx9COyHYZ3vseprVdXnDUSiHnyysBGIlEcrD B4pjxdYrMsOnHGCywCpPMn0+VOc5Gv8= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-13_02,2026-07-10_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 adultscore=0 malwarescore=0 spamscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607130125 To let a driver easily separate header and data in the generated coredump, allow a vendor driver to pad its header to a fixed size by: - exposing MAX_HCI_DEVCD_HDR_SIZE as the max header size - exposing HCI_DEVCD_HDR_END as the header-ending marker Signed-off-by: Zijun Hu --- include/net/bluetooth/coredump.h | 4 ++++ net/bluetooth/coredump.c | 7 ++----- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/include/net/bluetooth/coredump.h b/include/net/bluetooth/cored= ump.h index ab85a6adfffd..b668277bdb76 100644 --- a/include/net/bluetooth/coredump.h +++ b/include/net/bluetooth/coredump.h @@ -8,6 +8,10 @@ =20 #define DEVCOREDUMP_TIMEOUT msecs_to_jiffies(10000) /* 10 sec */ =20 +/* total size shared by coredump and driver's dmp_hdr() */ +#define MAX_HCI_DEVCD_HDR_SIZE 512 +#define HCI_DEVCD_HDR_END "--- Start dump ---\n" + typedef void (*coredump_t)(struct hci_dev *hdev); typedef void (*dmp_hdr_t)(struct hci_dev *hdev, struct sk_buff *skb); typedef void (*notify_change_t)(struct hci_dev *hdev, int state); diff --git a/net/bluetooth/coredump.c b/net/bluetooth/coredump.c index 913bbba559f8..af444b48b82d 100644 --- a/net/bluetooth/coredump.c +++ b/net/bluetooth/coredump.c @@ -34,8 +34,6 @@ struct hci_devcoredump_skb_pattern { hci_dmp_cb(skb)->pkt_type, \ hci_devcd_state_name(hdev->dump.state)) =20 -#define MAX_DEVCOREDUMP_HDR_SIZE 512 /* bytes */ - static int hci_devcd_update_hdr_state(char *buf, size_t size, int state) { int len =3D 0; @@ -63,7 +61,6 @@ static int hci_devcd_update_state(struct hci_dev *hdev, i= nt state) =20 static int hci_devcd_mkheader(struct hci_dev *hdev, struct sk_buff *skb) { - char dump_start[] =3D "--- Start dump ---\n"; char hdr[80]; int hdr_len; =20 @@ -74,7 +71,7 @@ static int hci_devcd_mkheader(struct hci_dev *hdev, struc= t sk_buff *skb) if (hdev->dump.dmp_hdr) hdev->dump.dmp_hdr(hdev, skb); =20 - skb_put_data(skb, dump_start, strlen(dump_start)); 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Signed-off-by: Zijun Hu --- drivers/bluetooth/btusb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 4c3193ec2d52..9c3a6d7d8f1e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1032,6 +1032,7 @@ struct btusb_data { =20 int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb); int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb); + int (*recv_intr)(struct btusb_data *data, void *buffer, int count); int (*recv_bulk)(struct btusb_data *data, void *buffer, int count); =20 int (*setup_on_usb)(struct hci_dev *hdev); @@ -1504,7 +1505,7 @@ static void btusb_intr_complete(struct urb *urb) if (urb->status =3D=3D 0) { hdev->stat.byte_rx +=3D urb->actual_length; =20 - if (btusb_recv_intr(data, urb->transfer_buffer, + if (data->recv_intr(data, urb->transfer_buffer, urb->actual_length) < 0) { bt_dev_err(hdev, "corrupted event packet"); hdev->stat.err_rx++; @@ -2711,7 +2712,7 @@ static int btusb_recv_bulk_intel(struct btusb_data *d= ata, void *buffer, * same way as the ones received from the interrupt endpoint. */ if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) - return btusb_recv_intr(data, buffer, count); 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31174ae6cd9sm74577772eec.31.2026.07.13.05.01.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 05:01:14 -0700 (PDT) From: Zijun Hu Date: Mon, 13 Jul 2026 05:01:14 -0700 Subject: [PATCH v2 4/5] Bluetooth: btusb: Make btusb_recv_{event,acl}() take struct hci_dev * Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260713-btusb_prep_qcc2072-v2-4-bbcb651285f2@oss.qualcomm.com> References: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> In-Reply-To: <20260713-btusb_prep_qcc2072-v2-0-bbcb651285f2@oss.qualcomm.com> To: Marcel Holtmann , Luiz Augusto von Dentz Cc: Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.3 X-Proofpoint-ORIG-GUID: Go23jk9NollN1ja_Xmod3TIiB4enIQPG X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfX+xbiSfpnJSI/ bdSOzzci6s6fSbo4T68DM5NWHcD2yZqhhtfpvYeZ3MYXVbt00ttf+J9AxqblCZl/94H619B+hjr OkoXBtSfGZ/kUFpEST5Qse56viMoLSg= X-Authority-Analysis: v=2.4 cv=e6c2j6p/ c=1 sm=1 tr=0 ts=6a54d38c cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=JDCWVgv_UVR-pCJ6T6sA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEzMDEyNSBTYWx0ZWRfXzpuvC4B4qXCr dQGs58Lk5FInDjZR9EDO4bDmk0nz7pBAkcmKkzbFsUabZrUoezQyWorvUBkUu5w+/g1jRnR5fpJ 2zbwlNkEdVltp8C47l5U9nt5sX90akoEzba3Zj0t9bgWvmwfe+xcsHsV0zlGuctnsi8Sx/hrMhZ hO5TFF7Y2L+jn3yFM72O2wRPrbL7ew2546Hdplu9EVJZ+nHFdUcza98U8HNPL9IlcdIB+akVXbT AE9CAquuiKTgkL7eN+vd0Y8SPkX8LOqPFZoyJYfoE3zTlsdOFGSkUs00cpwaTEHx2I3CtJLZntA ViTMfBQ5F9HGmX0ect7KFQraLVZGQkULWyEVx/nyaBa4T7GDhIV5e16m1aEfO0udtwpSo0wOAi0 yrsoLUlZH6nt2mSTbVH9eXsNXjjKx1oSDMu4IrL1JszDWUzyrXAG3MeoFrlfCm+88y0yZn4ebY+ fETH/YqJKmh/T1a/Mmg== X-Proofpoint-GUID: Go23jk9NollN1ja_Xmod3TIiB4enIQPG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-13_02,2026-07-10_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1015 phishscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 malwarescore=0 impostorscore=0 suspectscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607130125 Vendor-specific files need to hand BT frames back to btusb after filtering out non-BT frames, but these helpers take struct btusb_data *, which is private to btusb.c: int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb) int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb) Change both to take struct hci_dev * so btusb and vendor files can share them. Signed-off-by: Zijun Hu --- drivers/bluetooth/btusb.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 9c3a6d7d8f1e..f4f911c3de52 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1253,14 +1253,16 @@ static inline void btusb_free_frags(struct btusb_da= ta *data) spin_unlock_irqrestore(&data->rxlock, flags); } =20 -static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb) +static int btusb_recv_event(struct hci_dev *hdev, struct sk_buff *skb) { + struct btusb_data *data =3D hci_get_drvdata(hdev); + if (data->intr_interval) { /* Trigger dequeue immediately if an event is received */ schedule_delayed_work(&data->rx_work, 0); } =20 - return data->recv_event(data->hdev, skb); + return data->recv_event(hdev, skb); } =20 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int coun= t) @@ -1320,7 +1322,7 @@ static int btusb_recv_intr(struct btusb_data *data, v= oid *buffer, int count) } =20 /* Complete frame */ - btusb_recv_event(data, skb); 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Signed-off-by: Zijun Hu --- drivers/bluetooth/btusb.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index f4f911c3de52..8d3bd98fce8a 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2075,6 +2075,14 @@ static void btusb_stop_traffic(struct btusb_data *da= ta) usb_kill_anchored_urbs(&data->ctrl_anchor); } =20 +static void btusb_prepare_reset(struct hci_dev *hdev) +{ + struct btusb_data *data =3D hci_get_drvdata(hdev); + + btusb_stop_traffic(data); + usb_kill_anchored_urbs(&data->tx_anchor); +} + static int btusb_close(struct hci_dev *hdev) { struct btusb_data *data =3D hci_get_drvdata(hdev); @@ -2917,8 +2925,7 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void= *rst_data) /* Release MediaTek ISO data interface */ btusb_mtk_release_iso_intf(hdev); =20 - btusb_stop_traffic(data); - usb_kill_anchored_urbs(&data->tx_anchor); + btusb_prepare_reset(hdev); =20 /* Toggle the hard reset line. The MediaTek device is going to * yank itself off the USB and then replug. The cleanup is handled --=20 2.34.1