[Intel-gfx] [PATCH] drm/atomic: Call ww_acquire_done after drm_modeset_lock_all

[Daniel Vetter]

On Wed, Feb 21, 2018 at 04:23:31PM +0100, Maarten Lankhorst wrote:
> After we acquired all generic modeset locks in drm_modeset_lock_all, it's
> unsafe acquire any other so just mark acquisition as done.
> 
> Atomic drivers shouldn't use drm_modeset_lock_all.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Also, I'm pretty much expecting to regret this like all the other
ww_acquire_done patches I've acked, but where's the fun in not trying :-)

Cheers, Daniel

> ---
>  drivers/gpu/drm/drm_modeset_lock.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
> index 963e23db0fe7..8a5100685875 100644
> --- a/drivers/gpu/drm/drm_modeset_lock.c
> +++ b/drivers/gpu/drm/drm_modeset_lock.c
> @@ -113,6 +113,7 @@ void drm_modeset_lock_all(struct drm_device *dev)
>  		kfree(ctx);
>  		return;
>  	}
> +	ww_acquire_done(&ctx->ww_ctx);
>  
>  	WARN_ON(config->acquire_ctx);
>  
> -- 
> 2.16.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch