linux-kernel - [PATCH 2/3] drm/virtio: implement prime pin/unpin

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Date:   Wed, 27 Feb 2019 15:44:40 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org (open list:VIRTIO GPU DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/3] drm/virtio: implement prime pin/unpin

virtio-gpu objects never move around, so effectively they are pinned
all the time.  This makes the the implementation pretty easy ;)

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/virtio/virtgpu_prime.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c
index b4c9199349e7..0fcae0e46abd 100644
--- a/drivers/gpu/drm/virtio/virtgpu_prime.c
+++ b/drivers/gpu/drm/virtio/virtgpu_prime.c
@@ -30,13 +30,13 @@
 
 int virtgpu_gem_prime_pin(struct drm_gem_object *obj)
 {
-	WARN_ONCE(1, "not implemented");
-	return -ENODEV;
+	/* nothing: all virtio-gpu objects are pinned all the time */
+	return 0;
 }
 
 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj)
 {
-	WARN_ONCE(1, "not implemented");
+	/* nothing */
 }
 
 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)
-- 
2.9.3