[Bug 60824] [PATCH][regression] Cambridge Silicon Radio, Ltd Bluetooth Dongle unusable

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https://bugzilla.kernel.org/show_bug.cgi?id=60824

--- Comment #164 from Yuri Santos (yrds96@xxxxxxxxxxxxxx) ---
(In reply to vinodmishra from comment #155)
> (In reply to Flole from comment #154)
> > (In reply to Alex from comment #86)
> > > Hi Swyter,
> > > 
> > > I also tried your patch v2 and actually in my case see no difference with
> > > the previous ones I tried (see my comments 55/56
> > > https://bugzilla.kernel.org/show_bug.cgi?id=60824#c55 )
> > > 
> > > Linux recognizes the controller, but it's unusable:
> > > 
> > > Can't init device hci0: Invalid argument (22)
> > > 
> > > > HCI Event: Command Complete (0x0e) plen 4                               
> > > >                                                                  #22
> > [hci0]
> > > > 11.191461
> > >       Set Event Filter (0x03|0x0005) ncmd 1
> > >         Status: Invalid HCI Command Parameters (0x12)
> > > = Close Index: 00:1A:7D:DA:71:12                                          
> > > [hci0] 11.191493
> > > 
> > > 
> > > I've seen several people here have this issue, and I believe that comment
> > 59
> > > may be quite relevant here:
> > > 
> > > > Set Event fails, looking at hci_core.c the set filter and previous
> calls
> > > are
> > > > made only if device supports BREDR, is there any way to tell device
> > doesn't
> > > > support, or patch this ?
> > 
> > I have the same device, and my fix was simply changing the #define that
> > checks if a device supports BREDR to "false" (aka disabling BREDR support
> > completely) and that solved it.
> Thanks so much. 
> Same device and same issue on Pi Zero. Changing the "#define
> lmp_bredr_capable(dev)" in hci_core.h to return false did the trick.

Thanks, i did that. Seems to have a advance, but still not working as expected.


Info and logs:

https://gist.github.com/Yrds/5c2d610c86facc9b1f0522a6509e9e23

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