[lvc-project] [PATCH 5.15/6.1] drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring

[Roman Demidov]

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

commit 79405e774ede411c6b47ed41c651e40b92de64a2 upstream.

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

Fixes: 14f43e8f88c5 ("drm/amdgpu: move JPEG2.5 out from VCN2.5")
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 3216a7f4e2642bda5fd14f57586e835ae9202587)
Signed-off-by: Sasha Levin <sashal at kernel.org>
Signed-off-by: Roman Demidov <roman.demidov.nn at gmail.com>
---
Backport fix for CVE-2026-63847

 drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
index f87d0f6ffc93..a094dd138c0d 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
@@ -641,6 +641,7 @@ static const struct amd_ip_funcs jpeg_v2_6_ip_funcs = {
 static const struct amdgpu_ring_funcs jpeg_v2_5_dec_ring_vm_funcs = {
 	.type = AMDGPU_RING_TYPE_VCN_JPEG,
 	.align_mask = 0xf,
+	.no_user_fence = true,
 	.vmhub = AMDGPU_MMHUB_1,
 	.get_rptr = jpeg_v2_5_dec_ring_get_rptr,
 	.get_wptr = jpeg_v2_5_dec_ring_get_wptr,
@@ -671,6 +672,7 @@ static const struct amdgpu_ring_funcs jpeg_v2_5_dec_ring_vm_funcs = {
 static const struct amdgpu_ring_funcs jpeg_v2_6_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_5_dec_ring_get_rptr,
 	.get_wptr = jpeg_v2_5_dec_ring_get_wptr,
-- 
2.53.0