bluetooth-next pull request for net-next:

core:
 - hci_core: Rate limit the logging of invalid ISO handle
 - hci_sync: make hci_cmd_sync_run_once return -EEXIST if exists
 - hci_event: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
 - hci_event: fix potential UAF in SSP passkey handlers
 - HCI: Avoid a couple -Wflex-array-member-not-at-end warnings
 - L2CAP: CoC: Disconnect if received packet size exceeds MPS
 - L2CAP: Add missing chan lock in l2cap_ecred_reconf_rsp
 - L2CAP: Fix printing wrong information if SDU length exceeds MTU
 - SCO: check for codecs->num_codecs == 1 before assigning to sco_pi(sk)->codec

drivers:
 - btusb: MT7922: Add VID/PID 0489/e174
 - btusb: Add Lite-On 04ca:3807 for MediaTek MT7921
 - btusb: Add MT7927 IDs ASUS ROG Crosshair X870E Hero, Lenovo Legion Pro 7
	  16ARX9, Gigabyte Z790 AORUS MASTER X, MSI X870E Ace Max, TP-Link
	  Archer TBE550E, ASUS X870E / ProArt X870E-Creator.
 - btusb: Add MT7902 IDs 13d3/3579, 13d3/3580, 13d3/3594, 13d3/3596, 0e8d/1ede
 - btusb: MediaTek MT7922: Add VID 0489 & PID e11d
 - btintel: Add support for Scorpious Peak2 support
 - btintel: Add support for Scorpious Peak2F support
 - btintel_pcie: Add device id of Scorpius Peak2, Nova Lake-PCD-H
 - btintel_pcie: Add device id of Scorpious2, Nova Lake-PCD-S
 - btmtk: Add reset mechanism if downloading firmware failed
 - btmtk: Add MT6639 (MT7927) Bluetooth support
 - btmtk: fix ISO interface setup for single alt setting
 - btmtk: add MT7902 SDIO support
 - Bluetooth: btmtk: add MT7902 MCU support
 - btbcm: Add entry for BCM4343A2 UART Bluetooth
 - qca: enable pwrseq support for wcn39xx devices
 - hci_qca: Fix BT not getting powered-off on rmmod
 - hci_qca: disable power control for WCN7850 when bt_en is not defined
 - hci_qca: Fix missing wakeup during SSR memdump handling
 - hci_ldisc: Clear HCI_UART_PROTO_INIT on error
 - mmc: sdio: add MediaTek MT7902 SDIO device ID
 - hci_ll: Enable BROKEN_ENHANCED_SETUP_SYNC_CONN for WL183x
Bluetooth: hci_qca: Fix missing wakeup during SSR memdump handling

When a Bluetooth controller encounters a coredump, it triggers the
Subsystem Restart (SSR) mechanism. The controller first reports the
coredump data and, once the upload is complete, sends a hw_error
event. The host relies on this event to proceed with subsequent
recovery actions.

If the host has not finished processing the coredump data when the
hw_error event is received, it waits until either the processing is
complete or the 8-second timeout expires before handling the event.

The current implementation clears QCA_MEMDUMP_COLLECTION using
clear_bit(), which does not wake up waiters sleeping in
wait_on_bit_timeout(). As a result, the waiting thread may remain
blocked until the timeout expires even if the coredump collection
has already completed.

Fix this by clearing QCA_MEMDUMP_COLLECTION with
clear_and_wake_up_bit(), which also wakes up the waiting thread and
allows the hw_error handling to proceed immediately.

Test case:
- Trigger a controller coredump using:
    hcitool cmd 0x3f 0c 26
- Tested on QCA6390.
- Capture HCI logs using btmon.
- Verify that the delay between receiving the hw_error event and
  initiating the power-off sequence is reduced compared to the
  timeout-based behavior.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Shuai Zhang <shuai.zhang@oss.qualcomm.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
1 file changed