drm/amdgpu: Add checking mc_vram_size

Do not compare injection address with mc_vram_size
if mc_vram_size is zero.

Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 89e9ba33aca1e8f79f8278ae82d0e25f05411919..4769a18304d7a4435403ffce859902b25e70f816 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -489,7 +489,8 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f,
                ret = amdgpu_ras_feature_enable(adev, &data.head, 1);
                break;
        case 2:
-               if ((data.inject.address >= adev->gmc.mc_vram_size) ||
+               if ((data.inject.address >= adev->gmc.mc_vram_size &&
+                   adev->gmc.mc_vram_size) ||
                    (data.inject.address >= RAS_UMC_INJECT_ADDR_LIMIT)) {
                        dev_warn(adev->dev, "RAS WARN: input address "
                                        "0x%llx is invalid.",