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Subject: Re: [RFC] Status of orinoco_usb
To:     Kalle Valo <kvalo@codeaurora.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jes Sorensen <Jes.Sorensen@gmail.com>
References: <20201002103517.fhsi5gaepzbzo2s4@linutronix.de>
 <20201002113725.GB3292884@kroah.com>
 <20201002115358.6aqemcn5vqc5yqtw@linutronix.de>
 <20201002120625.GA3341753@kroah.com> <877ds4damx.fsf@codeaurora.org>
From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
Message-ID: <0c67580b-1bed-423b-2f00-49eae20046aa@broadcom.com>
Date:   Tue, 6 Oct 2020 09:45:07 +0200
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+ Jes

On 10/5/2020 4:12 PM, Kalle Valo wrote:
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> writes:
> 
>> On Fri, Oct 02, 2020 at 01:53:58PM +0200, Sebastian Andrzej Siewior wrote:
>>> On 2020-10-02 13:37:25 [+0200], Greg Kroah-Hartman wrote:
>>>>> Is it possible to end up here in softirq context or is this a relic?
>>>>
>>>> I think it's a relic of where USB host controllers completed their urbs
>>>> in hard-irq mode.  The BH/tasklet change is a pretty recent change.
>>>
>>> But the BH thingy for HCDs went in v3.12 for EHCI. XHCI was v5.5. My
>>> guess would be that people using orinoco USB are on EHCI :)
>>
>> USB 3 systems run XHCI, which has a USB 2 controller in it, so these
>> types of things might not have been noticed yet.  Who knows :)
>>
>>>>> Should it be removed?
>>>>
>>>> We can move it out to drivers/staging/ and then drop it to see if anyone
>>>> complains that they have the device and is willing to test any changes.
>>>
>>> Not sure moving is easy since it depends on other files in that folder.
>>> USB is one interface next to PCI for instance. Unless you meant to move
>>> the whole driver including all interfaces.
>>> I was suggesting to remove the USB bits.
>>
>> I forgot this was tied into other code, sorry.  I don't know what to
>> suggest other than maybe try to fix it up the best that you can, and
>> let's see if anyone notices...
> 
> That's what I would suggest as well.
> 
> These drivers for ancient hardware are tricky. Even if there doesn't
> seem to be any users on the driver sometimes people pop up reporting
> that it's still usable. We had that recently with one another wireless
> driver (forgot the name already).

Quite a while ago I shipped an orinoco dongle to Jes Sorensen which he 
wanted to use for some intern project if I recall correctly. Guess that 
idea did not fly yet.

Regards,
Arend

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