On Thu, Aug 12, 2021 at 07:58:22PM +0800, Lecopzer Chen wrote: > Hi Greg > > Reason: > > We found without this, Poll() infinitely wait because OUTPUT queue > will never signaled after last CAPTURE queue is de-queued. > And some buffer can't be popped as expected. > > > commit id: 566463afdbc43c7744c5a1b89250fc808df03833 > subject: "media: v4l2-mem2mem: always consider OUTPUT queue during poll" > > This should be applied to 4.4+ without conflict after > (f1a81afc98e315f4bf600d28f8a19a5655f7cfe0 "[media] m2m: fix bad unlock balance") Applied to 5.4.y, but if you want it to go older, we need backported versions as it did not apply cleanly. thanks, greg k-h
