[PATCH 5.10/5.15/6.1] drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring

[Roman Demidov]

From: Yinjie Yao <yinjie.yao@xxxxxxx>

commit a2baf12eec41f246689e6a3f8619af1200031576 upstream.

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

Fixes: dfd57dbf44dd ("drm/amdgpu: add JPEG3.0 support for Sienna_Cichlid")
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Yinjie Yao <yinjie.yao@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Roman Demidov <roman.demidov.nn@xxxxxxxxx>
---
Backport fix for CVE-2026-63846

 drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c
index 323d68b2124f..f1957d4fa7a8 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c
@@ -560,6 +560,7 @@ static const struct amd_ip_funcs jpeg_v3_0_ip_funcs = {
 static const struct amdgpu_ring_funcs jpeg_v3_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_v3_0_dec_ring_get_rptr,
 	.get_wptr = jpeg_v3_0_dec_ring_get_wptr,
-- 
2.53.0