Re: [PATCH 3/9] Revert "drm/virtio: Use dma_buf from GEM object instance"

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Hi

Am 11.07.25 um 13:49 schrieb Dmitry Osipenko:
On 7/11/25 14:31, Simona Vetter wrote:
On Fri, Jul 11, 2025 at 02:29:04PM +0300, Dmitry Osipenko wrote:
On 7/11/25 12:35, Thomas Zimmermann wrote:
This reverts commit 415cb45895f43015515473fbc40563ca5eec9a7c.

Reverting because the fix-up commits are suspected to cause regressions.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Are the fixes and stable tags missing in the patches? AFAICT, the intent
is to fix stable 6.15 kernel regression.
Yes, I'll add them when merging to drm-fixes.
On a second look, I don't see the reverted commits in 6.15, so only
6.16-rc should be affected.

---
  drivers/gpu/drm/virtio/virtgpu_prime.c | 5 +++--
  1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c
index 722cde5e2d86..97aaee26cb02 100644
--- a/drivers/gpu/drm/virtio/virtgpu_prime.c
+++ b/drivers/gpu/drm/virtio/virtgpu_prime.c
@@ -204,15 +204,16 @@ static void virtgpu_dma_buf_free_obj(struct drm_gem_object *obj)
  {
  	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
  	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
+	struct dma_buf_attachment *attach = obj->import_attach;
if (drm_gem_is_imported(obj)) {
-		struct dma_buf *dmabuf = bo->dma_buf;
+		struct dma_buf *dmabuf = attach->dmabuf;
Nit: I'd write this as `dmabuf = obj->import_attach->dmabuf` for more
consistency with drm_gem_is_imported()
Reverts shouldn't have any additional changes, even style nits imo, so
I'll leave it as-is.
AFAICS, this patch is not a direct/clean revert, it reverts two commits
with manual edit. There is 44b6535d8ace on top of the reverted
415cb45895f4 and final result isn't same as a revert of 415cb45895f4.

It's exactly the revert mentioned in the commit message. There was a conflict at

-		struct dma_buf *dmabuf = bo->dma_buf;
+		struct dma_buf *dmabuf = attach->dmabuf;


which I resolved.

Best regards
Thomas





--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)





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