RISC-V: Fix a race condition during kernel stack overflow

[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_mes.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index fe82b8b19a4ed26406f976924bb36a03f61b4853..0c546245793b9c292851db1098ce14c2f27fe734 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -181,6 +181,9 @@ int amdgpu_mes_init(struct amdgpu_device *adev)
        for (i = 0; i < AMDGPU_MES_MAX_SDMA_PIPES; i++) {
                if (adev->ip_versions[SDMA0_HWIP][0] < IP_VERSION(6, 0, 0))
                        adev->mes.sdma_hqd_mask[i] = i ? 0 : 0x3fc;
+               /* zero sdma_hqd_mask for non-existent engine */
+               else if (adev->sdma.num_instances == 1)
+                       adev->mes.sdma_hqd_mask[i] = i ? 0 : 0xfc;
                else
                        adev->mes.sdma_hqd_mask[i] = 0xfc;
        }