drm/gem-dma: Use dma_buf from GEM object instance

Avoid dereferencing struct drm_gem_object.import_attach for the
imported dma-buf. The dma_buf field in the GEM object instance refers
to the same buffer. Prepares to make import_attach optional.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Anusha Srivatsa <asrivats@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250226172457.217725-4-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/drm_gem_dma_helper.c b/drivers/gpu/drm/drm_gem_dma_helper.c
index 4f0320df858f89232626524cfbf5f60bd074b8a2..b7f033d4352a34a1334da51787f4cca8df4d2ef1 100644 (file)
--- a/drivers/gpu/drm/drm_gem_dma_helper.c
+++ b/drivers/gpu/drm/drm_gem_dma_helper.c
@@ -230,7 +230,7 @@ void drm_gem_dma_free(struct drm_gem_dma_object *dma_obj)
 
        if (drm_gem_is_imported(gem_obj)) {
                if (dma_obj->vaddr)
-                       dma_buf_vunmap_unlocked(gem_obj->import_attach->dmabuf, &map);
+                       dma_buf_vunmap_unlocked(gem_obj->dma_buf, &map);
                drm_prime_gem_destroy(gem_obj, dma_obj->sgt);
        } else if (dma_obj->vaddr) {
                if (dma_obj->map_noncoherent)