Re: [PATCH v2] drm/syncobj: Fix sync syncobj issue

[Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>]

I'll let Lucas comment. I've only looked a little at it.
From what I remember just enabling sw_signaling was enough to fix the 
issue.

-Lionel

On 12/07/2022 13:26, Christian König wrote:
> Ping to the Intel guys here. Especially Lucas/Nirmoy/Lionel.
>
> IIRC you stumbled over that problem as well, have you found any solution?
>
> Regards,
> Christian.
>
> Am 07.07.22 um 12:29 schrieb jie1zhan:
> > enable signaling after flatten dma_fence_chains on transfer
> >
> > Signed-off-by: jie1zhan <jesse.zhang@xxxxxxx>
> > ---
> >   drivers/gpu/drm/drm_syncobj.c | 1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpu/drm/drm_syncobj.c 
> > b/drivers/gpu/drm/drm_syncobj.c
> > index 7e48dcd1bee4..0d9d3577325f 100644
> > --- a/drivers/gpu/drm/drm_syncobj.c
> > +++ b/drivers/gpu/drm/drm_syncobj.c
> > @@ -920,6 +920,7 @@ static int 
> > drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
> >       if (ret)
> >           goto err_free_fence;
> >   +    dma_fence_enable_sw_signaling(fence);
> >       chain = dma_fence_chain_alloc();
> >       if (!chain) {
> >           ret = -ENOMEM;