netdev - Re: [patch 2/3] hci_usb: remove code obfuscation

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Message-Id: <3E40C481-B07D-446B-8B22-013173C6074C@holtmann.org>
Date:	Tue, 20 May 2008 19:26:42 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Pavel Machek <pavel@...e.cz>
Cc:	akpm@...ux-foundation.org, hidave.darkstar@...il.com,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [patch 2/3] hci_usb: remove code obfuscation

Hi Pavel,

>>> There needs to be some load on the usb. I use
>>> rsync-over-bt-over-gprs/umts.
>>
>> you told me before and I believe you. This driver is not in its  
>> best shape.
>> Weird thing is that I never got it re-produced. If you find the  
>> real cause.
>> That would be great.
>
> The cause seems to be hci_usb_close() racing with the USB core and
> completion handlers...
>
>>>>> It could be easily fixed by just not freeing the urbs during
>>>>> disconnect (introducing very very slow memory leak). Would that be
>>>>> acceptable?
>>>>
>>>> I don't think so.
>>>>
>>>> Have you ever tried btusb driver? That code is a lot cleaner and  
>>>> it uses
>>>> USB anchors for the queued URBs (no home grown broken URB queues).
>>>
>>> I wish I knew about  this one earlier. Yes, it seems to work for me.
>>
>> Does this mean you are not fixing hci_usb anymore ;)
>
> I'm not sure what's next, as hci_usb is still in opensuse11...

the goal should be improve btusb. Especially add all the needed quirks  
from the hci_usb driver to it. I have a patch for it, but I need to  
reverse the HCI_RESET logic.

However if you have hci_usb patches, send them, I will review them and  
David will happily apply them I guess.

Regards

Marcel

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