# Re: \[PATCH\] Bluetooth: msft: add a bluetooth parameter, msft\_enable

- From: Koba Ko \<hidden\>
- Date: 2021-08-12 06:00:37 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/08/1475710
- Thread: https://ratatoskr.run/linux-bluetooth/2021/08/1475656/t.md

```text
On Thu, Aug 12, 2021 at 1:37 PM Koba Ko [ref] wrote:
>
> On Thu, Aug 12, 2021 at 1:29 PM Marcel Holtmann [ref] wrote:
> >
> > Hi Koba,
> >
> > > With Intel AC9560, follow this scenario and can't turn on bt since.
> > > 1. turn off BT
> > > 2. then suspend&resume multiple times
> > > 3. turn on BT
> > >
> > > Get this error message after turn on bt.
> > > [ 877.194032] Bluetooth: hci0: urb 0000000061b9a002 failed to resubmit (113)
> > > [ 886.941327] Bluetooth: hci0: Failed to read MSFT supported features (-110)
> > >
> > > Remove msft from compilation would be helpful.
> > > Turn off msft would be also helpful.
> > >
> > > Because msft is enabled as default and can't turn off without
> > > compliation,
> > > Introduce a bluetooth parameter, msft_enable, to control.
> > >
> > > Signed-off-by: Koba Ko <redacted>
> > > ---
> > > include/net/bluetooth/hci_core.h |  1 +
> > > net/bluetooth/hci_core.c         | 16 ++++++++++++++++
> > > net/bluetooth/msft.c             | 30 +++++++++++++++++++++++++++++-
> > > 3 files changed, 46 insertions(+), 1 deletion(-)
> >
> > NAK.
> >
> > This is for the Intel guys to figure out. Otherwise I am going to disable MSFT extension for AC9560 completely. What is your hw_variant for that hardware?
> Would you please guide to dump hw_variant? thanks
Found it,
Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-0-1.ddc


> >
> > Regards
> >
> > Marcel
> >
```