Re: [PATCH v2] usb: host: xhci: Support running urb giveback in tasklet context

[Mathias Nyman]

On 7.5.2019 19.02, Suwan Kim wrote:
> On Mon, Apr 01, 2019 at 11:16:11PM +0900, Suwan Kim wrote:
> > Patch "USB: HCD: support giveback of URB in tasklet context"[1]
> > introduced giveback of urb in tasklet context. [1] This patch was
> > applied to ehci but not xhci. [2] This patch significantly reduces
> > the hard irq time of xhci. Especially for uvc driver, the hard irq
> > including the uvc completion function runs quite long but applying
> > this patch reduces the hard irq time of xhci.
>
> I sent this patch a month ago but got no answer.
> Is there any feedback for this?
> Please let me know if there are any faults or it needs more tests.

I'll add this to a internal tree first, and let it sit there for a few
weeks, trying to catch possible bugs this change could expose.

-Mathias