[lvc-project] [PATCH 5.10/5.15/6.1] drm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring

[Roman Demidov]

From: Yinjie Yao <yinjie.yao at amd.com>

commit e5f612dc91650561fe2b5b76dd6d2898ec9ad480 upstream.

JPEG rings do not support 64-bit user fence writes, reject CS
submissions with user fences.

Fixes: 6ac27241106b ("drm/amdgpu: add JPEG v2.0 function supports")
Reviewed-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Yinjie Yao <yinjie.yao at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
(cherry picked from commit 96179da0c6b059eb31706a0abe8dd6381c533143)
Signed-off-by: Sasha Levin <sashal at kernel.org>
Signed-off-by: Roman Demidov <roman.demidov.nn at gmail.com>
---
Backport fix for CVE-2026-63848

 drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c
index 3301ad980f28..af8f244e9c94 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c
@@ -762,6 +762,7 @@ static const struct amd_ip_funcs jpeg_v2_0_ip_funcs = {
 static const struct amdgpu_ring_funcs jpeg_v2_0_dec_ring_vm_funcs = {
 	.type = AMDGPU_RING_TYPE_VCN_JPEG,
 	.align_mask = 0xf,
+	.no_user_fence = true,
 	.vmhub = AMDGPU_MMHUB_0,
 	.get_rptr = jpeg_v2_0_dec_ring_get_rptr,
 	.get_wptr = jpeg_v2_0_dec_ring_get_wptr,
-- 
2.53.0