linux-kernel - Re: [PATCH 2/3] drm/vc4: Match drm_dev_enter and exit calls in vc4_hvs_atomic

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Message-ID: <3ab32439-1abb-40cd-8afc-7e790d931805@samsung.com>
Date: Wed, 9 Oct 2024 08:20:42 +0200
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: Dave Stevenson <dave.stevenson@...pberrypi.com>, Maxime Ripard
	<mripard@...nel.org>, Raspberry Pi Kernel Maintenance
	<kernel-list@...pberrypi.com>, Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>, Thomas Zimmermann
	<tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter
	<simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] drm/vc4: Match drm_dev_enter and exit calls in
 vc4_hvs_atomic_flush

On 08.10.2024 18:44, Dave Stevenson wrote:
> Commit 92c17d16476c ("drm/vc4: hvs: Ignore atomic_flush if we're disabled")
> added a path which returned early without having called drm_dev_exit.
>
> Ensure all paths call drm_dev_exit.
>
> Fixes: 92c17d16476c ("drm/vc4: hvs: Ignore atomic_flush if we're disabled")
> Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
>   drivers/gpu/drm/vc4/vc4_hvs.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
> index 546ee11016b2..c5ebc317188a 100644
> --- a/drivers/gpu/drm/vc4/vc4_hvs.c
> +++ b/drivers/gpu/drm/vc4/vc4_hvs.c
> @@ -603,7 +603,7 @@ void vc4_hvs_atomic_flush(struct drm_crtc *crtc,
>   	}
>   
>   	if (vc4_state->assigned_channel == VC4_HVS_CHANNEL_DISABLED)
> -		return;
> +		goto exit;
>   
>   	if (debug_dump_regs) {
>   		DRM_INFO("CRTC %d HVS before:\n", drm_crtc_index(crtc));
> @@ -686,6 +686,7 @@ void vc4_hvs_atomic_flush(struct drm_crtc *crtc,
>   		vc4_hvs_dump_state(hvs);
>   	}
>   
> +exit:
>   	drm_dev_exit(idx);
>   }
>   
>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland