Re: [PATCH v2 1/4] Bluetooth: Keep MSFT ext info throughout a hci_dev's life cycle

[Marcel Holtmann]

Hi Miao-chen,

> This moves msft_do_close() from hci_dev_do_close() to
> hci_unregister_dev() to avoid clearing MSFT extension info. This also
> avoids retrieving MSFT info upon every msft_do_open() if MSFT extension
> has been initialized.

what is the actual benefit of this?

It is fundamentally one extra HCI command and that one does no harm. You are trying to outsmart the hdev->setup vs the !hdev->setup case. I don’t think this is a good idea.

So unless I see a real argument why we want to do this, I am leaving this patch out. And on a side note, I named these function exactly this way so they are symmetric with hci_dev_do_{open,close}.

Regards

Marcel