[Bug 221481] btintel_pcie: suspend fails with -EBUSY on Intel Lunar Lake (s2idle)

https://bugzilla.kernel.org/show_bug.cgi?id=221481

[email protected] changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #2 from [email protected] ---
Laptop: Lenovo ThinkPad E14 Gen 7
CPU: Intel Core Ultra 7 258V
Kernel: 7.1.8-200.fc44.x86_64
Distro: Fedora 44 Gnome Wayland
Bluetooth device: 00:14.7 Bluetooth [0d11]: Intel Corporation Device
[8086:a876] (rev 10)

Additional detail regarding firmware:

In dmesg, the driver fails to load the firmware:
`Bluetooth: hci0: Failed to load Intel firmware file
intel/ibt-0190-01a1-iml.sfi (-2)`

Checking `/lib/firmware/intel/` shows that `ibt-0190-0041` and `ibt-0190-0291`
are present in linux-firmware, but revision `01a1` (`ibt-0190-01a1-iml.sfi`) is
missing.

This missing firmware leaves the Bluetooth controller in an uninitialized
state, which directly leads to the D2 suspend timeout (error -16)

[s2idle] failed.

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