[Bug 215167] Bluetooth: hci0: command 0xfc05 tx timeout

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215167

--- Comment #42 from Patrick Blesi (patrick.blesi@gmail.com) ---
(In reply to Patrick Blesi from comment #41)
> I am experiencing the same problem with 5.15.67 for USB Device
> USB_DEVICE(0x8087, 0x0aaa).
> 
> ~ $ uname -a
> Linux a0d7b954-ssh 5.15.67 #1 SMP Tue Sep 13 13:54:38 UTC 2022 x86_64 Linux
> 
> ~ $ lsusb
> Bus 001 Device 001: ID 1d6b:0002
> Bus 001 Device 003: ID 1043:8012
> Bus 002 Device 001: ID 1d6b:0003
> Bus 001 Device 002: ID 8087:0aaa
> 
> ~ $ dmesg | grep -i bluetooth
> [    0.454719] Bluetooth: Core ver 2.22
> [    0.454904] NET: Registered PF_BLUETOOTH protocol family
> [    0.455504] Bluetooth: HCI device and connection manager initialized
> [    0.455896] Bluetooth: HCI socket layer initialized
> [    0.456392] Bluetooth: L2CAP socket layer initialized
> [    0.456894] Bluetooth: SCO socket layer initialized
> [    4.452912] Bluetooth: hci0: Reading Intel version command failed (-110)
> [    4.452955] Bluetooth: hci0: command 0xfc05 tx timeout
> [    4.498402] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
> [    4.498405] Bluetooth: BNEP filters: protocol multicast
> [    4.498409] Bluetooth: BNEP socket layer initialized

This was actually a red herring. The issue was manifested by not connecting my
Bluetooth PCI devices as a passthrough to my lxd virtual machine. To resolve I
removed the Bluetooth USB device (0x8087, 0x0aaa) and added the PCI controller
and shared RAM PCI controller in the same iommu group.

00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI
Controller (rev 30) 
00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)

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