Re: [PATCH v1] Bluetooth: btintel: Check if controller is ISO capable on btintel_classify_pkt_type

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Hi Sean,

On Thu, Jul 10, 2025 at 9:18 AM Sean Rhodes <sean@starlabs.systems> wrote:
>
> Hi Luiz
>
> Yes, works perfectly with that patch.
>
> Thanks
>
> Sean
>
> On Wed, 9 Jul 2025 at 21:06, Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx> wrote:
>>
>> Hi Sean,
>>
>> On Wed, Jul 9, 2025 at 3:13 PM Luiz Augusto von Dentz
>> <luiz.dentz@xxxxxxxxx> wrote:
>> >
>> > From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
>> >
>> > Due to what seem to be a bug with variant version returned by some
>> > firmwares the code may set hdev->classify_pkt_type with
>> > btintel_classify_pkt_type when in fact the controller doesn't even
>> > support ISO channels feature but may use the handle range expected from
>> > a controllers that does causing the packets to be reclassified as ISO
>> > causing several bugs.
>> >
>> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=219553
>> > Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2100565
>> > Link: https://github.com/StarLabsLtd/firmware/issues/180
>> > Fixes: f25b7fd36cc3 ("Bluetooth: Add vendor-specific packet classification for ISO data")
>> > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
>> > ---
>> >  drivers/bluetooth/btintel.c | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
>> > index 55cc1652bfe4..06575a0b9aee 100644
>> > --- a/drivers/bluetooth/btintel.c
>> > +++ b/drivers/bluetooth/btintel.c
>> > @@ -2670,7 +2670,7 @@ static u8 btintel_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
>> >          * Distinguish ISO data packets form ACL data packets
>> >          * based on their connection handle value range.
>> >          */
>> > -       if (hci_skb_pkt_type(skb) == HCI_ACLDATA_PKT) {
>> > +       if (iso_capable(hdev) && hci_skb_pkt_type(skb) == HCI_ACLDATA_PKT) {
>> >                 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
>> >
>> >                 if (hci_handle(handle) >= BTINTEL_ISODATA_HANDLE_BASE)
>> > --
>> > 2.50.0
>>
>> Can you try with the changes above?
>>
>> --
>> Luiz Augusto von Dentz

Please add Tested-by so we can move to get it merged, I do intend to
send a pull request later this week.

-- 
Luiz Augusto von Dentz





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