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To:     linux-bluetooth@vger.kernel.org
From:   Oliver Hartkopp <socketcan@hartkopp.net>
Subject: Latest Linux tree (merge window): BT mouse does not work
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Hi all,

after upgrading from Linus' tree 5.16.0-rc7-00108-g800829388818 to the 
current merge window version 5.16.0-05432-g6f38be8f2ccd my BT mouse is 
not working anymore.

I now get two new error messages:

	hci0: unexpected event 0xff length: 5 > 0

and

	hci0: unexpected event 0xff length: 7 > 0

Any idea? Any new firmware required?

Best regards,
Oliver

[    8.790201] Bluetooth: Core ver 2.22
[    8.847435] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 
2015
[    8.853022] Bluetooth: hci0: Device revision is 16
[    8.853025] Bluetooth: hci0: Secure boot is enabled
[    8.853026] Bluetooth: hci0: OTP lock is enabled
[    8.853027] Bluetooth: hci0: API lock is enabled
[    8.853028] Bluetooth: hci0: Debug lock is disabled
[    8.853028] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    8.855879] Bluetooth: hci0: Found device firmware: intel/ibt-12-16.sfi

[    9.422098] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    9.423532] Bluetooth: BNEP filters: protocol multicast
[    9.423537] Bluetooth: BNEP socket layer initialized
[    9.439281] iwlwifi 0000:01:00.0 wlp1s0: renamed from wlan0
[   10.391796] Bluetooth: hci0: Waiting for firmware download to complete
[   10.392752] Bluetooth: hci0: unexpected event 0xff length: 5 > 0
[   10.392789] Bluetooth: hci0: Firmware loaded in 1492456 usecs
[   10.392985] Bluetooth: hci0: Waiting for device to boot
[   10.404942] Bluetooth: hci0: unexpected event 0xff length: 7 > 0
[   10.404971] Bluetooth: hci0: Device booted in 11747 usecs
[   10.405416] Bluetooth: hci0: Found Intel DDC parameters: 
intel/ibt-12-16.ddc
[   10.407835] Bluetooth: hci0: Applying Intel DDC parameters completed
[   10.408848] Bluetooth: hci0: Firmware revision 0.1 build 50 week 12 2019
[   10.468582] NET: Registered PF_ALG protocol family
[   11.277319] Bluetooth: RFCOMM TTY layer initialized
[   11.277343] Bluetooth: RFCOMM socket layer initialized
[   11.277367] Bluetooth: RFCOMM ver 1.11