Re: [PATCH] Fix managing dbus filters depending on BT state

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Hi,

On Mon, Nov 22, 2010 at 4:33 PM, Johan Hedberg <johan.hedberg@xxxxxxxxx> wrote:
> Hi Bartosz,
>
> On Mon, Nov 22, 2010, Bartosz Szatkowski wrote:
>> Previously even if BT was disabled, bluetoothd would handle some dbus
>> singals (mostly connected with HFP). Now filters are added when
>> BT is enabled and removed when BT is disabled.
>> ---
>>  audio/manager.c          |    4 ++--
>>  audio/telephony-dummy.c  |   10 ++++++++++
>>  audio/telephony-maemo5.c |   10 ++++++++++
>>  audio/telephony-maemo6.c |   10 ++++++++++
>>  audio/telephony-ofono.c  |   10 ++++++++++
>>  audio/telephony.h        |    1 +
>>  src/adapter.c            |    5 +++++
>>  7 files changed, 48 insertions(+), 2 deletions(-)
>
> Nack on this one. I understand the issue you're trying to fix but it
> needs to be done differently.
>
>> diff --git a/audio/manager.c b/audio/manager.c
>> index 816c807..2fc7bf1 100644
>> --- a/audio/manager.c
>> +++ b/audio/manager.c
>> @@ -1178,7 +1178,7 @@ proceed:
>>               btd_register_adapter_driver(&media_server_driver);
>>
>>       if (enabled.headset) {
>> -             telephony_init();
>> +             telephony_set_state(1);
>>               btd_register_adapter_driver(&headset_server_driver);
>>       }
>
> If you're gonna call this "state" you should have proper defines or
> enums for the values, however in this case it's essentially a boolean so
> that's not necessary. In fact since it's a boolean you don't even need
> to have any new function or variable at all for it: just use
> telephony_init and telephony_exit.
>
>> --- a/src/adapter.c
>> +++ b/src/adapter.c
>> @@ -57,6 +57,7 @@
>>  #include "glib-helper.h"
>>  #include "agent.h"
>>  #include "storage.h"
>> +#include "../audio/telephony.h"
>>
>>  #define IO_CAPABILITY_DISPLAYONLY    0x00
>>  #define IO_CAPABILITY_DISPLAYYESNO   0x01
>> @@ -2404,6 +2405,8 @@ int adapter_start(struct btd_adapter *adapter)
>>
>>       err = adapter_up(adapter, mode);
>>
>> +     telephony_init();
>> +
>
> This is just wrong. The core daemon should never have direct access to
> the telephony driver. Instead, you should have the audio plugin
> (probably audio/manager.c or audio/headset.c) register a adapter powered
> callback and then call telehony_init/exit from that callback.

I have an almost working version of this using adapter drivers and
powered changes via callback registration, the tricky part here is how
to detect when to do headset_init/headset_exit since those should be
called only once. I didn't know there somebody working on this but
anyway I gonna try to finish this asap.

-- 
Luiz Augusto von Dentz
Computer Engineer
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