[PATCH] drm/amd/ras: skip RAS TA firmware reload on resume for SR-IOV VFs

[Chi Hong <Chi.Hong@amd.com>]

SR-IOV VFs use amdgpu_virt_ras_hw_init() which skips ras_core_hw_init(),
leaving fw_gpu_mem unallocated. ras_psp_reload_firmwares() then hits the
NULL buffer and returns -ENOMEM (-12) for every VF on resume, aborting
ip_resume_phase2 before amdgpu_fence_driver_hw_init() runs. The next
hibernate double-puts IRQ refcounts causing a WARN storm.

Skip the reload for VFs — there is nothing local to reload. The
post-reset path (amdgpu_ras_mgr_resume_after_reset) is unaffected.

Fixes: 5e5be56a5b76 ("drm/amdgpu/ras: reload RAS TA from ras mgr resume")
Signed-off-by: Chi Hong <Chi.Hong@amd.com>
---
 drivers/gpu/drm/amd/ras/ras_mgr/amdgpu_ras_mgr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/ras/ras_mgr/amdgpu_ras_mgr.c b/drivers/gpu/drm/amd/ras/ras_mgr/amdgpu_ras_mgr.c
index a02167397ce2..5bac792554f5 100644
--- a/drivers/gpu/drm/amd/ras/ras_mgr/amdgpu_ras_mgr.c
+++ b/drivers/gpu/drm/amd/ras/ras_mgr/amdgpu_ras_mgr.c
@@ -529,6 +529,9 @@ static int amdgpu_ras_mgr_resume(struct amdgpu_ip_block *ip_block)
 	if (!ras_mgr->ras_is_ready)
 		return 0;
 
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
 	ret = ras_psp_reload_firmwares(ras_mgr->ras_core, 0);
 	if (ret)
 		RAS_DEV_ERR(adev,
-- 
2.43.0