linux-kernel - Re: [PATCH] drm/dp_mst: add missed nv50_outp_release in nv50_msto

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Date:   Thu, 12 Dec 2019 10:14:25 +0200
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     David Airlie <airlied@...ux.ie>, nouveau@...ts.freedesktop.org,
        Chuhong Yuan <hslester96@...il.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH] drm/dp_mst: add missed nv50_outp_release in nv50_msto_disable

On Fri, 06 Dec 2019, Chuhong Yuan <hslester96@...il.com> wrote:
> nv50_msto_disable() does not call nv50_outp_release() to match
> nv50_outp_acquire() like other disable().
> Add the missed call to fix it.

The subject prefix "drm/dp_mst" implies drm core change, but this is
about nouveau. Please fix.

BR,
Jani.

>
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index 549486f1d937..84e1417355cc 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -862,8 +862,10 @@ nv50_msto_disable(struct drm_encoder *encoder)
>  
>  	mstm->outp->update(mstm->outp, msto->head->base.index, NULL, 0, 0);
>  	mstm->modified = true;
> -	if (!--mstm->links)
> +	if (!--mstm->links) {
>  		mstm->disabled = true;
> +		nv50_outp_release(mstm->outp);
> +	}
>  	msto->disabled = true;
>  }

-- 
Jani Nikula, Intel Open Source Graphics Center