linux-kernel - Re: [PATCH 02/15] dmr/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL

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Date:   Fri, 17 Sep 2021 11:31:02 -0400
From:   Sean Paul <sean@...rly.run>
To:     Fernando Ramos <greenfoo@....eu>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        sean@...rly.run, linux-doc@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        nouveau@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 02/15] dmr/i915: cleanup: drm_modeset_lock_all_ctx() -->
 DRM_MODESET_LOCK_ALL_BEGIN()

On Thu, Sep 16, 2021 at 11:15:39PM +0200, Fernando Ramos wrote:
> As requested in Documentation/gpu/todo.rst, replace the boilerplate code
> surrounding drm_modeset_lock_all_ctx() with DRM_MODESET_LOCK_ALL_BEGIN()
> and DRM_MODESET_LOCK_ALL_END()
> 

With the subject fixed (s/dmr/drm),

Reviewed-by: Sean Paul <sean@...rly.run>

> Signed-off-by: Fernando Ramos <greenfoo@....eu>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 17 ++++-------------
>  1 file changed, 4 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 134a6acbd8fb..997a16e85c85 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -13476,22 +13476,13 @@ void intel_display_resume(struct drm_device *dev)
>  	if (state)
>  		state->acquire_ctx = &ctx;
>  
> -	drm_modeset_acquire_init(&ctx, 0);
> -
> -	while (1) {
> -		ret = drm_modeset_lock_all_ctx(dev, &ctx);
> -		if (ret != -EDEADLK)
> -			break;
> -
> -		drm_modeset_backoff(&ctx);
> -	}
> +	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
>  
> -	if (!ret)
> -		ret = __intel_display_resume(dev, state, &ctx);
> +	ret = __intel_display_resume(dev, state, &ctx);
>  
>  	intel_enable_ipc(dev_priv);
> -	drm_modeset_drop_locks(&ctx);
> -	drm_modeset_acquire_fini(&ctx);
> +
> +	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
>  
>  	if (ret)
>  		drm_err(&dev_priv->drm,
> -- 
> 2.33.0
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS