Bug 215015

Summary:	rtl8723bs restarting loop
Product:	Drivers	Reporter:	Serg Podtynnyi (serg)
Component:	Bluetooth	Assignee:	linux-bluetooth (linux-bluetooth)
Status:	RESOLVED PATCH_ALREADY_AVAILABLE
Severity:	high	CC:	serg
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	5.15.2	Subsystem:
Regression:	Yes	Bisected commit-id:

Description Serg Podtynnyi 2021-11-14 11:20:40 UTC

Using tablet on Intel Atom platform cherry trail with rtl8723bs, Arch Linux distro. After kernel update to the 5.15.2 Bluetooth constantly turning on and off as seen in logs switching back to 5.14.16 solves the issue.

```
Nov 13 10:44:41 talos systemd[1]: systemd-rfkill.service: Deactivated successfully.
Nov 13 10:44:43 talos systemd[1]: Starting Load/Save RF Kill Switch Status...
Nov 13 10:44:43 talos systemd[1]: Stopped target Bluetooth Support.
Nov 13 10:44:43 talos systemd[1]: Started Load/Save RF Kill Switch Status.
Nov 13 10:44:44 talos kernel: Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
Nov 13 10:44:44 talos kernel: Bluetooth: hci0: RTL: rom_version status=0 version=1
Nov 13 10:44:44 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_fw.bin
Nov 13 10:44:44 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_config-OBDA8723.bin
Nov 13 10:44:44 talos systemd[1]: Reached target Bluetooth Support.
Nov 13 10:44:44 talos systemd[460]: Reached target Bluetooth.
Nov 13 10:44:44 talos kernel: Bluetooth: hci0: RTL: cfg_sz 64, total sz 24508
Nov 13 10:44:45 talos kernel: Bluetooth: hci0: RTL: fw version 0x365d462e
Nov 13 10:44:49 talos systemd[1]: systemd-rfkill.service: Deactivated successfully.
Nov 13 10:44:49 talos systemd[1]: systemd-hostnamed.service: Deactivated successfully.
Nov 13 10:44:52 talos systemd[460]: Stopped target Bluetooth.
Nov 13 10:44:52 talos systemd[1]: Starting Load/Save RF Kill Switch Status...
Nov 13 10:44:52 talos systemd[1]: Stopped target Bluetooth Support.
Nov 13 10:44:52 talos systemd[1]: Started Load/Save RF Kill Switch Status.
Nov 13 10:44:53 talos kernel: Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
Nov 13 10:44:53 talos kernel: Bluetooth: hci0: RTL: rom_version status=0 version=1
Nov 13 10:44:53 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_fw.bin
Nov 13 10:44:53 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_config-OBDA8723.bin
Nov 13 10:44:53 talos systemd[1]: Reached target Bluetooth Support.
Nov 13 10:44:53 talos systemd[460]: Reached target Bluetooth.
Nov 13 10:44:53 talos kernel: Bluetooth: hci0: RTL: cfg_sz 64, total sz 24508
Nov 13 10:44:54 talos kernel: Bluetooth: hci0: RTL: fw version 0x365d462e
Nov 13 10:44:58 talos systemd[1]: systemd-rfkill.service: Deactivated successfully.
Nov 13 10:45:01 talos systemd[460]: Stopped target Bluetooth.
Nov 13 10:45:01 talos systemd[1]: Starting Load/Save RF Kill Switch Status...
Nov 13 10:45:01 talos systemd[1]: Stopped target Bluetooth Support.
Nov 13 10:45:01 talos systemd[1]: Started Load/Save RF Kill Switch Status.
Nov 13 10:45:01 talos kernel: Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
Nov 13 10:45:01 talos kernel: Bluetooth: hci0: RTL: rom_version status=0 version=1
Nov 13 10:45:01 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_fw.bin
Nov 13 10:45:01 talos kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_config-OBDA8723.bin
Nov 13 10:45:01 talos systemd[460]: Reached target Bluetooth.
Nov 13 10:45:01 talos systemd[1]: Reached target Bluetooth Support.
```

Comment 1 Serg Podtynnyi 2021-11-21 21:22:21 UTC

Fixed in 5.15.3