linux-kernel - Re: [PATCH v.2] 4.15 vmgfx boot warning

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Date:   Tue, 19 Dec 2017 11:50:57 -0800
From:   Sinclair Yeh <syeh@...are.com>
To:     Woody Suwalski <terraluna977@...il.com>
Cc:     Daniel Vetter <daniel.vetter@...el.com>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Dave Airlie <airlied@...ux.ie>
Subject: Re: [PATCH v.2] 4.15 vmgfx boot warning

This looks okay to me.

On Mon, Dec 18, 2017 at 07:26:03PM -0500, Woody Suwalski wrote:
> The 4.15 drm_atomic_helper driver shows a warning during boot (both 32 and
> 64 bit x86)
> It is caused by a mismatch between the result of vmw_enable_vblank() and
> what the drm_atomic_helper expects:
>    /...
>    ret = drm_crtc_vblank_get(crtc);
>    WARN_ONCE(ret != -EINVAL, "driver forgot to call
> drm_crtc_vblank_off()\n");
>    /...
> 
> Signed-off by: Woody Suwalski <terraluna977@...il.com>
> 
> --- a/drivers/gpu/drm/drm_atomic_helper.c    2017-12-16 09:55:33.853374561
> -0500
> +++ b/drivers/gpu/drm/drm_atomic_helper.c    2017-12-16 10:55:56.089090752
> -0500
> @@ -889,7 +889,7 @@ disable_outputs(struct drm_device *dev,
>              continue;
> 
>          ret = drm_crtc_vblank_get(crtc);
> -        WARN_ONCE(ret != -EINVAL, "driver forgot to call
> drm_crtc_vblank_off()\n");
> +        WARN_ONCE((ret != -EINVAL && ret != -ENOSYS), "driver forgot to
> call drm_crtc_vblank_off()\n");
>          if (ret == 0)
>              drm_crtc_vblank_put(crtc);
>      }
> 

> --- a/drivers/gpu/drm/drm_atomic_helper.c	2017-12-16 09:55:33.853374561 -0500
> +++ b/drivers/gpu/drm/drm_atomic_helper.c	2017-12-16 10:55:56.089090752 -0500
> @@ -889,7 +889,7 @@ disable_outputs(struct drm_device *dev,
>  			continue;
>  
>  		ret = drm_crtc_vblank_get(crtc);
> -		WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n");
> +		WARN_ONCE((ret != -EINVAL && ret != -ENOSYS), "driver forgot to call drm_crtc_vblank_off()\n");
>  		if (ret == 0)
>  			drm_crtc_vblank_put(crtc);
>  	}