[PATCH] fix 5.15 init regression for Intel Bluetooth

[PATCH] fix 5.15 init regression for Intel Bluetooth

[Ortwin Glück]

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Hi

On all 5.15 kernels the Intel Bluetooth no longer works. All was fine in 5.14.
Apparently the quirk is needed for this device.

vanilla 5.15.5:
    Bluetooth: hci0: Reading Intel version command failed (-110)
    Bluetooth: hci0: command tx timeout

with patch:
    Bluetooth: hci0: Legacy ROM 2.5 revision 1.0 build 3 week 17 2014
    Bluetooth: hci0: Intel device is already patched. patch num: 32

Please apply to stable too.

Thanks

Ortwin

[-- Attachment #2: 0001-Bluetooth-btusb-Add-init-quitk.patch --]
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From fb721988425ffd40e09603a3e8b141c0b46b74e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ortwin=20Gl=C3=BCck?= <odi@odi.ch>
Date: Sat, 4 Dec 2021 14:25:56 +0100
Subject: [PATCH] Bluetooth: btusb: Add init quitk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fixes the boot regression against 5.14:
 Bluetooth: hci0: Reading Intel version command failed (-110)
 Bluetooth: hci0: command tx timeout

Signed-off-by: Ortwin Glück <odi@odi.ch>
Cc: stable@vger.kernel.org
---
 drivers/bluetooth/btusb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 79d0db542da3..232cfcb41734 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -366,7 +366,8 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
 	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
 						     BTUSB_INTEL_BROKEN_INITIAL_NCMD },
-	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED },
+	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
+						     BTUSB_INTEL_BROKEN_INITIAL_NCMD },
 	{ USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
 	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED },
 	{ USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
-- 
2.32.0

Re: [PATCH] fix 5.15 init regression for Intel Bluetooth

[Thorsten Leemhuis]

[TLDR: I'm adding this regression to regzbot, the Linux kernel
regression tracking bot; most text you find below is compiled from a few
templates paragraphs some of you might have seen already.]

On 27.12.21 11:26, Ortwin Glück wrote:
> 
> On all 5.15 kernels the Intel Bluetooth no longer works. All was fine in
> 5.14.
> Apparently the quirk is needed for this device.
> 
> vanilla 5.15.5:
>    Bluetooth: hci0: Reading Intel version command failed (-110)
>    Bluetooth: hci0: command tx timeout
> 
> with patch:
>    Bluetooth: hci0: Legacy ROM 2.5 revision 1.0 build 3 week 17 2014
>    Bluetooth: hci0: Intel device is already patched. patch num: 32
> 
> Please apply to stable too.

Hi, this is your Linux kernel regression tracker speaking.

Thanks for the report.

Adding the regression mailing list to the list of recipients, as it
should be in the loop for all regressions, as explained here:
https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html

To be sure this issue doesn't fall through the cracks unnoticed, I'm
adding it to regzbot, my Linux kernel regression tracking bot:

#regzbot ^introduced v5.14..v5.15
#regzbot title bluetooth: Intel Bluetooth no longer works
#regzbot ignore-activity

Reminder: when fixing the issue, please add a 'Link:' tag with the URL
to the report (the parent of this mail) using the kernel.org redirector,
as explained in 'Documentation/process/submitting-patches.rst'. Regzbot
then will automatically mark the regression as resolved once the fix
lands in the appropriate tree. For more details about regzbot see footer.

Sending this to everyone that got the initial report, to make all aware
of the tracking. I also hope that messages like this motivate people to
directly get at least the regression mailing list and ideally even
regzbot involved when dealing with regressions, as messages like this
wouldn't be needed then.

Don't worry, I'll send further messages wrt to this regression just to
the lists (with a tag in the subject so people can filter them away), as
long as they are intended just for regzbot. With a bit of luck no such
messages will be needed anyway.

Ciao, Thorsten (wearing his 'Linux kernel regression tracker' hat).

P.S.: As a Linux kernel regression tracker I'm getting a lot of reports
on my table. I can only look briefly into most of them. Unfortunately
therefore I sometimes will get things wrong or miss something important.
I hope that's not the case here; if you think it is, don't hesitate to
tell me about it in a public reply. That's in everyone's interest, as
what I wrote above might be misleading to everyone reading this; any
suggestion I gave thus might sent someone reading this down the wrong
rabbit hole, which none of us wants.

BTW, I have no personal interest in this issue, which is tracked using
regzbot, my Linux kernel regression tracking bot
(https://linux-regtracking.leemhuis.info/regzbot/). I'm only posting
this mail to get things rolling again and hence don't need to be CC on
all further activities wrt to this regression.

---
Additional information about regzbot:

If you want to know more about regzbot, check out its web-interface, the
getting start guide, and/or the references documentation:

https://linux-regtracking.leemhuis.info/regzbot/
https://gitlab.com/knurd42/regzbot/-/blob/main/docs/getting_started.md
https://gitlab.com/knurd42/regzbot/-/blob/main/docs/reference.md

The last two documents will explain how you can interact with regzbot
yourself if your want to.

Hint for reporters: when reporting a regression it's in your interest to
tell #regzbot about it in the report, as that will ensure the regression
gets on the radar of regzbot and the regression tracker. That's in your
interest, as they will make sure the report won't fall through the
cracks unnoticed.

Hint for developers: you normally don't need to care about regzbot once
it's involved. Fix the issue as you normally would, just remember to
include a 'Link:' tag to the report in the commit message, as explained
in Documentation/process/submitting-patches.rst
That aspect was recently was made more explicit in commit 1f57bd42b77c:
https://git.kernel.org/linus/1f57bd42b77c

Re: [PATCH] fix 5.15 init regression for Intel Bluetooth

[Paul Menzel]

Dear Ortwin,


Am 27.12.21 um 11:26 schrieb Ortwin Glück:

> On all 5.15 kernels the Intel Bluetooth no longer works. All was fine in 
> 5.14.
> Apparently the quirk is needed for this device.
> 
> vanilla 5.15.5:
>     Bluetooth: hci0: Reading Intel version command failed (-110)
>     Bluetooth: hci0: command tx timeout
> 
> with patch:
>     Bluetooth: hci0: Legacy ROM 2.5 revision 1.0 build 3 week 17 2014
>     Bluetooth: hci0: Intel device is already patched. patch num: 32
> 
> Please apply to stable too.

This has been already reported in *[PATCH] Bluetooth: Apply initial 
command workaround for more Intel chips* [1].

As I replied there, on what device do you experience this, and how can 
it be reproduced?

I have a Dell Latitude E7250 with the Bluetooth device 0x0a2a, and 
everything works fine under Debian sid/unstable with Linux 5.15 up to 
5.16-rc6.

     Bus 002 Device 003: ID 8087:0a2a Intel Corp. Bluetooth wireless 
interface


Kind regards,

Paul


[1]: 
https://lore.kernel.org/linux-bluetooth/20211202162256.31837-1-tiwai@suse.de/

Re: [PATCH] fix 5.15 init regression for Intel Bluetooth

[An, Tedd]

Hi Ortwin,

On Mon, 2021-12-27 at 11:26 +0100, Ortwin Glück wrote:
> 
> Hi
> 
> On all 5.15 kernels the Intel Bluetooth no longer works. All was fine in 5.14.
> Apparently the quirk is needed for this device.
> 
> vanilla 5.15.5:
>     Bluetooth: hci0: Reading Intel version command failed (-110)
>     Bluetooth: hci0: command tx timeout
> 
> with patch:
>     Bluetooth: hci0: Legacy ROM 2.5 revision 1.0 build 3 week 17 2014
>     Bluetooth: hci0: Intel device is already patched. patch num: 32
> 
> Please apply to stable too.
> 
> Thanks
> 
> Ortwin

The fix for this issue is in bluetooth-next and will be merged to mainline soon.
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=95655456e7cee858a23793f67025765b4c4c227b

Regards,
Tedd

Re: [PATCH] fix 5.15 init regression for Intel Bluetooth

[Thorsten Leemhuis]

On 08.01.22 03:08, An, Tedd wrote:
> On Mon, 2021-12-27 at 11:26 +0100, Ortwin Glück wrote:
>> On all 5.15 kernels the Intel Bluetooth no longer works. All was fine in 5.14.
>> Apparently the quirk is needed for this device.
>>
>> vanilla 5.15.5:
>>     Bluetooth: hci0: Reading Intel version command failed (-110)
>>     Bluetooth: hci0: command tx timeout
>>
>> with patch:
>>     Bluetooth: hci0: Legacy ROM 2.5 revision 1.0 build 3 week 17 2014
>>     Bluetooth: hci0: Intel device is already patched. patch num: 32
>>
>> Please apply to stable too.
> 
> The fix for this issue is in bluetooth-next and will be merged to mainline soon.
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=95655456e7cee858a23793f67025765b4c4c227b

Tedd, many thx for fixing this. Next time when you fix a issue, please
include a "Link:" tag to all issue reports on the list (IOW: the message
that started this thread) and in bug trackers, as explained in
Documentation/process/submitting-patches.rst. To quote:

```
If related discussions or any other background information behind the
change can be found on the web, add 'Link:' tags pointing to it. In case
your patch fixes a bug, for example, add a tag with a URL referencing
the report in the mailing list archives or a bug tracker;
```

This concept is old, but the text was reworked recently to make this use
case for the Link: tag clearer. For details see:
https://git.kernel.org/linus/1f57bd42b77c

These link help others that want to look into the issue now or in a year
from now. There are also tools out there that rely on these links to
connect reports and fixes. Regzbot, the regression tracking bot I use,
is one such tool which I'm running (there might be others). And because
the link was missing, I now have to tell the bot manually about the fix. :-/

#regzbot fixed-by:  95655456e7cee858a2

Ciao, Thorsten