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Message-ID: <0c67580b-1bed-423b-2f00-49eae20046aa@broadcom.com>
Date: Tue, 6 Oct 2020 09:45:07 +0200
From: Arend Van Spriel <arend.vanspriel@...adcom.com>
To: Kalle Valo <kvalo@...eaurora.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
linux-kernel@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Jes Sorensen <Jes.Sorensen@...il.com>
Subject: Re: [RFC] Status of orinoco_usb
+ Jes
On 10/5/2020 4:12 PM, Kalle Valo wrote:
> Greg Kroah-Hartman <gregkh@...uxfoundation.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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