linux-kernel - Re: [bluetooth] linux-3.x regression (bisected)

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Message-ID: <CACJA=fU4QerTS0EEz_Q+16_nPH73WEPadVM53-ZEV8vkEgQD8Q@mail.gmail.com>
Date:	Wed, 4 Jan 2012 11:16:00 -0300
From:	Andre Guedes <andre.guedes@...nbossa.org>
To:	Rene Herman <rene.herman@...il.com>
Cc:	Marcel Holtmann <marcel@...tmann.org>,
	Gustavo Padovan <padovan@...fusion.mobi>,
	linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org
Subject: Re: [bluetooth] linux-3.x regression (bisected)

Hi Rene,

On Wed, Jan 4, 2012 at 9:04 AM, Rene Herman <rene.herman@...il.com> wrote:
>
> On 28-12-11 17:48, Marcel Holtmann wrote:
>
>> The correct patch would be something like this:
>>
>> diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
>> index 919e3c0..b6eb9c5 100644
>> --- a/net/bluetooth/hci_event.c
>> +++ b/net/bluetooth/hci_event.c
>> @@ -711,7 +711,8 @@ static void hci_cc_read_local_ext_features(struct
>> hci_dev *h
>>         if (rp->status)
>>                 return;
>>
>> -       memcpy(hdev->extfeatures, rp->features, 8);
>> +       if (rp->page == 1)
>> +               memcpy(hdev->extfeatures, rp->features, 8);
>>
>>         hci_req_complete(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
>> rp->status);
>>  }
>>
>> The current patch is actually fully broken anyway. So besides switching
>> LE on when requesting page 0, you will also switch it off when
>> requesting any other page and it accidentally returns 0x00 since we
>> unconditionally overwrite it.
>
>
> Any word on a final fix for this?

Yes,this couple of patches fixes this issue:
http://article.gmane.org/gmane.linux.bluez.kernel/19950/
http://article.gmane.org/gmane.linux.bluez.kernel/19951/

They were already pushed to bluetooth-next tree.

BR,

Andre
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