linux-stable.git/drivers/bluetooth/btintel_pcie.c, branch linux-rolling-lts

Bluetooth: btintel_pcie: Fix incorrect MAC access programming

2026-06-01T15:51:06+00:00

[ Upstream commit 88365d04fdc821dc4e9eb0cc00fdf6905430d172 ]

btintel_pcie_get_mac_access() and btintel_pcie_release_mac_access()
were programming STOP_MAC_ACCESS_DIS and XTAL_CLK_REQ in addition to
the MAC_ACCESS_REQ handshake. These bits are not part of the host
MAC-access handshake on the supported parts; the driver was
programming them incorrectly. Drop the writes so the register update
contains only the bits the controller actually consumes.

Fixes: b9465e6670a2 ("Bluetooth: btintel_pcie: Read hardware exception data")
Signed-off-by: Kiran K 
Signed-off-by: Luiz Augusto von Dentz 
Signed-off-by: Sasha Levin

Bluetooth: btintel_pcie: Use IRQF_ONESHOT and default primary handler

2026-02-26T22:59:05+00:00

[ Upstream commit 28abed6569c87eab9071ab56c64433c2f0d9ce51 ]

There is no added value in btintel_pcie_msix_isr() compared to
irq_default_primary_handler().

Using a threaded interrupt without a dedicated primary handler mandates
the IRQF_ONESHOT flag to mask the interrupt source while the threaded
handler is active. Otherwise the interrupt can fire again before the
threaded handler had a chance to run.

Use the default primary interrupt handler by specifying NULL and set
IRQF_ONESHOT so the interrupt source is masked until the secondary
handler is done.

Fixes: c2b636b3f788d ("Bluetooth: btintel_pcie: Add support for PCIe transport")
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Thomas Gleixner 
Link: https://patch.msgid.link/20260128095540.863589-7-bigeasy@linutronix.de
Signed-off-by: Sasha Levin

Bluetooth: btintel_pcie: Support for S4 (Hibernate)

2026-01-30T09:32:28+00:00

commit 1fb0d830dab89d0dc99bb84a7087b0ceca63d2d8 upstream.

During S4 (hibernate), the Bluetooth device loses power. Upon resume,
the driver performs the following actions:

1. Unregisters hdev
2. Calls function level reset
3. Registers hdev

Test case:
- run command sudo rtcwake -m disk -s 60

Signed-off-by: Ravindra 
Signed-off-by: Kiran K 
Signed-off-by: Luiz Augusto von Dentz 
Cc: Mariappan Ramasamy 
Signed-off-by: Greg Kroah-Hartman

Bluetooth: btintel_pcie: Fix event packet loss issue

2025-10-24T14:31:06+00:00

In the current btintel_pcie driver implementation, when an interrupt is
received, the driver checks for the alive cause before the TX/RX cause.
Handling the alive cause involves resetting the TX/RX queue indices.
This flow works correctly when the causes are mutually exclusive.
However, if both cause bits are set simultaneously, the alive cause
resets the queue indices, resulting in an event packet drop and a
command timeout. To fix this issue, the driver is modified to handle all
other causes before checking for the alive cause.

Test case:
Issue is seen with stress reboot scenario - 50x run

[20.337589] Bluetooth: hci0: Device revision is 0
[20.346750] Bluetooth: hci0: Secure boot is enabled
[20.346752] Bluetooth: hci0: OTP lock is disabled
[20.346752] Bluetooth: hci0: API lock is enabled
[20.346752] Bluetooth: hci0: Debug lock is disabled
[20.346753] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[20.346754] Bluetooth: hci0: Bootloader timestamp 2023.43 buildtype 1 build 11631
[20.359070] Bluetooth: hci0: Found device firmware: intel/ibt-00a0-00a1-iml.sfi
[20.371499] Bluetooth: hci0: Boot Address: 0xb02ff800
[20.385769] Bluetooth: hci0: Firmware Version: 166-34.25
[20.538257] Bluetooth: hci0: Waiting for firmware download to complete
[20.554424] Bluetooth: hci0: Firmware loaded in 178651 usecs
[21.081588] Bluetooth: hci0: Timeout (500 ms) on tx completion
[21.096541] Bluetooth: hci0: Failed to send frame (-62)
[21.110240] Bluetooth: hci0: sending frame failed (-62)
[21.138551] Bluetooth: hci0: Failed to send Intel Reset command
[21.170153] Bluetooth: hci0: Intel Soft Reset failed (-62)

Signed-off-by: Kiran K 
Signed-off-by: Sai Teja Aluvala 
Reviewed-by: Paul Menzel 
Fixes: c2b636b3f788 ("Bluetooth: btintel_pcie: Add support for PCIe transport")
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Refactor Device Coredump

2025-09-27T15:37:00+00:00

As device coredumps are not HCI traces, maintain the device coredump at
the driver level and eliminate the dependency on hdev_devcd*()

Signed-off-by: Kiran K 
Fixes: 07e6bddb54b4 ("Bluetooth: btintel_pcie: Add support for device coredump")
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Use strscpy() instead of strscpy_pad()

2025-09-27T15:37:00+00:00

kzalloc() already zero-initializes the destination buffer 'data', making
strscpy() sufficient for safely copying 'name'. The additional
NUL-padding performed by strscpy_pad() is unnecessary.

Add a new local variable to store the length of 'name' and reuse it
instead of recalculating the same length.

Signed-off-by: Thorsten Blum 
Reviewed-by: Paul Menzel 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Define hdev->wakeup() callback

2025-09-27T15:37:00+00:00

Implement hdev->wakeup() callback to support Wake On BT feature.

Test steps:
1. echo enabled > /sys/bus/pci/devices/0000:00:14.7/power/wakeup
2. connect bluetooth hid device
3. put the system to suspend - rtcwake -m mem -s 300
4. press any key on hid to wake up the system

Signed-off-by: Kiran K 
Signed-off-by: Chandrashekar Devegowda 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Move model comment before its definition

2025-09-27T15:37:00+00:00

This prevents the comments going over 80 columns which is still
required for Bluetooth code.

Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Add id of Scorpious, Panther Lake-H484

2025-09-27T15:37:00+00:00

sudo lspci -v -k -d 8086:e376
00:14.7 Bluetooth: Intel Corporation Device e376
        Subsystem: Intel Corporation Device 0011
        Flags: bus master, fast devsel, latency 0, IRQ 16, IOMMU group 14
        Memory at 14815368000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [c8] Power Management version 3
        Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [80] MSI-X: Enable+ Count=32 Masked-
        Capabilities: [100] Latency Tolerance Reporting
        Kernel driver in use: btintel_pcie
        Kernel modules: btintel_pcie

Reviewed-by: Paul Menzel 
Signed-off-by: Kiran K 
Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btintel_pcie: Add Bluetooth core/platform as comments

2025-09-27T15:37:00+00:00

Add Bluetooth CNVi core and platform names to the PCI device table for
each device ID as a comment.

Reviewed-by: Paul Menzel 
Signed-off-by: Kiran K 
Signed-off-by: Luiz Augusto von Dentz