drm amdgpu: Skip tmr load for SRIOV

1. For Navi12, CHIP_SIENNA_CICHLID, skip tmr load operation;
2. Check pointer before release firmware.

v2: use CHIP_SIENNA_CICHLID instead
v3: remove local "bool ret"; fix grammer issue
v4: use my name instead of "root"
v5: fix grammer issue and indent issue
Signed-off-by: Liu ChengZhe <ChengZhe.Liu@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c

@@ -193,12 +193,18 @@ static int psp_sw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
 	psp_memory_training_fini(&adev->psp);
-	release_firmware(adev->psp.sos_fw);
-	adev->psp.sos_fw = NULL;
-	release_firmware(adev->psp.asd_fw);
-	adev->psp.asd_fw = NULL;
-	release_firmware(adev->psp.ta_fw);
-	adev->psp.ta_fw = NULL;
+	if (adev->psp.sos_fw) {
+		release_firmware(adev->psp.sos_fw);
+		adev->psp.sos_fw = NULL;
+	}
+	if (adev->psp.asd_fw) {
+		release_firmware(adev->psp.asd_fw);
+		adev->psp.asd_fw = NULL;
+	}
+	if (adev->psp.ta_fw) {
+		release_firmware(adev->psp.ta_fw);
+		adev->psp.ta_fw = NULL;
+	}
 
 	if (adev->asic_type == CHIP_NAVI10)
 		psp_sysfs_fini(adev);
@@ -409,11 +415,28 @@ static int psp_clear_vf_fw(struct psp_context *psp)
 	return ret;
 }
 
+static bool psp_skip_tmr(struct psp_context *psp)
+{
+	switch (psp->adev->asic_type) {
+	case CHIP_NAVI12:
+	case CHIP_SIENNA_CICHLID:
+		return true;
+	default:
+		return false;
+	}
+}
+
 static int psp_tmr_load(struct psp_context *psp)
 {
 	int ret;
 	struct psp_gfx_cmd_resp *cmd;
 
+	/* For Navi12 and CHIP_SIENNA_CICHLID SRIOV, do not set up TMR.
+	 * Already set up by host driver.
+	 */
+	if (amdgpu_sriov_vf(psp->adev) && psp_skip_tmr(psp))
+		return 0;
+
 	cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
 	if (!cmd)
 		return -ENOMEM;