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Date:   Sun, 4 Oct 2020 12:53:14 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Marcel Holtmann <marcel@...tmann.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Sathish Narsimman <sathish.narasimman@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-bluetooth <linux-bluetooth@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "Bluetooth: Update resolving list when updating
 whitelist"

On Sun, Oct 04, 2020 at 12:51:24PM +0200, Greg Kroah-Hartman wrote:
> On Sat, Oct 03, 2020 at 08:33:18PM +0200, Marcel Holtmann wrote:
> > Hi Greg,
> > 
> > >>> This reverts commit 0eee35bdfa3b472cc986ecc6ad76293fdcda59e2 as it
> > >>> breaks all bluetooth connections on my machine.
> > >>> 
> > >>> Cc: Marcel Holtmann <marcel@...tmann.org>
> > >>> Cc: Sathish Narsimman <sathish.narasimman@...el.com>
> > >>> Fixes: 0eee35bdfa3b ("Bluetooth: Update resolving list when updating whitelist")
> > >>> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > >>> ---
> > >>> net/bluetooth/hci_request.c | 41 ++-----------------------------------
> > >>> 1 file changed, 2 insertions(+), 39 deletions(-)
> > >>> 
> > >>> This has been bugging me for since 5.9-rc1, when all bluetooth devices
> > >>> stopped working on my desktop system.  I finally got the time to do
> > >>> bisection today, and it came down to this patch.  Reverting it on top of
> > >>> 5.9-rc7 restored bluetooth devices and now my input devices properly
> > >>> work.
> > >>> 
> > >>> As it's almost 5.9-final, any chance this can be merged now to fix the
> > >>> issue?
> > >> 
> > >> can you be specific what breaks since our guys and I also think the
> > >> ChromeOS guys have been testing these series of patches heavily.
> > > 
> > > My bluetooth trackball does not connect at all.  With this reverted, it
> > > all "just works".
> > > 
> > > Same I think for a Bluetooth headset, can check that again if you really
> > > need me to, but the trackball is reliable here.
> > > 
> > >> When you run btmon does it indicate any errors?
> > > 
> > > How do I run it and where are the errors displayed?
> > 
> > you can do btmon -w trace.log and just let it run like tcdpump.
> 
> Ok, attached.
> 
> The device is not connecting, and then I open the gnome bluetooth dialog
> and it scans for devices in the area, but does not connect to my
> existing devices at all.
> 

And any hints on how to read this file?  'btsnoop' has no man page, and
the --help options are pretty sparse :(

thanks,

greg k-h

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