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Date:   Wed, 19 Jun 2019 11:57:08 +0200
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Gerd Hoffmann <kraxel@redhat.com>
Cc:     dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@lists.linux-foundation.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 07/12] drm/virtio: remove ttm calls from in
 virtio_gpu_object_{reserve,unreserve}
Message-ID: <20190619095708.GL12905@phenom.ffwll.local>
Mail-Followup-To: Gerd Hoffmann <kraxel@redhat.com>,
        dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
        "open list:VIRTIO GPU DRIVER" <virtualization@lists.linux-foundation.org>,
        open list <linux-kernel@vger.kernel.org>
References: <20190619090420.6667-1-kraxel@redhat.com>
 <20190619090420.6667-8-kraxel@redhat.com>
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On Wed, Jun 19, 2019 at 11:04:15AM +0200, Gerd Hoffmann wrote:
> Call reservation_object_* directly instead
> of using ttm_bo_{reserve,unreserve}.
> 
> v3: check for EINTR too.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/gpu/drm/virtio/virtgpu_drv.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
> index 06cc0e961df6..77ac69a8e6cc 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_drv.h
> +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
> @@ -402,9 +402,9 @@ static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo)
>  {
>  	int r;
>  
> -	r = ttm_bo_reserve(&bo->tbo, true, false, NULL);
> +	r = reservation_object_lock_interruptible(bo->gem_base.resv, NULL);
>  	if (unlikely(r != 0)) {
> -		if (r != -ERESTARTSYS) {
> +		if (r != -ERESTARTSYS && r != -EINTR) {

You only need to check for EINTR I think. ttm_bo_reserv does the EINVAL ->
ERESTARTSYS remapping.
-Daniel

>  			struct virtio_gpu_device *qdev =
>  				bo->gem_base.dev->dev_private;
>  			dev_err(qdev->dev, "%p reserve failed\n", bo);
> @@ -416,7 +416,7 @@ static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo)
>  
>  static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
>  {
> -	ttm_bo_unreserve(&bo->tbo);
> +	reservation_object_unlock(bo->gem_base.resv);
>  }
>  
>  /* virgl debufs */
> -- 
> 2.18.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch