[PATCH 7.2.y 1/3] accel/amdxdna: Disable device buffer exporting

[Sasha Levin <sashal@kernel.org>]

From: Lizhi Hou <lizhi.hou@amd.com>

[ Upstream commit 9480dd7ec3fcadd4217503e4bb32c16e19e4b21f ]

Device buffers are never intended to be exported. Disable exporting
support explicitly.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260526185058.1780869-1-lizhi.hou@amd.com
Stable-dep-of: f43fa4b8522b ("drm/xe/i2c: Fix the interrupt handling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/accel/amdxdna/amdxdna_gem.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/accel/amdxdna/amdxdna_gem.c b/drivers/accel/amdxdna/amdxdna_gem.c
index 2a16de96e6a4e..d18de7eb7af47 100644
--- a/drivers/accel/amdxdna/amdxdna_gem.c
+++ b/drivers/accel/amdxdna/amdxdna_gem.c
@@ -758,9 +758,15 @@ static int amdxdna_gem_dev_obj_vmap(struct drm_gem_object *obj, struct iosys_map
 	return 0;
 }
 
+static struct dma_buf *amdxdna_gem_dev_obj_export(struct drm_gem_object *gobj, int flags)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
 static const struct drm_gem_object_funcs amdxdna_gem_dev_obj_funcs = {
 	.free = amdxdna_gem_dev_obj_free,
 	.vmap = amdxdna_gem_dev_obj_vmap,
+	.export = amdxdna_gem_dev_obj_export,
 };
 
 static const struct drm_gem_object_funcs amdxdna_gem_shmem_funcs = {
-- 
2.53.0