drm/amdgpu: call release_firmware() without a NULL check

The release_firmware() function is NULL tolerant so we do not need
to check for NULL param before calling it.
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -3380,10 +3380,8 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 		amdgpu_pm_sysfs_fini(adev);
 	amdgpu_fbdev_fini(adev);
 	r = amdgpu_device_ip_fini(adev);
-	if (adev->firmware.gpu_info_fw) {
 	release_firmware(adev->firmware.gpu_info_fw);
 	adev->firmware.gpu_info_fw = NULL;
-	}
 	adev->accel_working = false;
 	/* free i2c buses */
 	if (!amdgpu_device_has_dc_support(adev))

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

@@ -196,10 +196,8 @@ static int psp_sw_fini(void *handle)
 	adev->psp.sos_fw = NULL;
 	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);

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -559,8 +559,8 @@ static void sdma_v4_0_destroy_inst_ctx(struct amdgpu_device *adev)
 	int i;
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
-		if (adev->sdma.instance[i].fw != NULL)
 		release_firmware(adev->sdma.instance[i].fw);
+		adev->sdma.instance[i].fw = NULL;
 
 		/* arcturus shares the same FW memory across
 		   all SDMA isntances */

drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c

@@ -1300,8 +1300,8 @@ static int sdma_v5_0_sw_fini(void *handle)
 	int i;
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
-		if (adev->sdma.instance[i].fw != NULL)
 		release_firmware(adev->sdma.instance[i].fw);
+		adev->sdma.instance[i].fw = NULL;
 
 		amdgpu_ring_fini(&adev->sdma.instance[i].ring);
 	}

drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c

@@ -115,8 +115,8 @@ static void sdma_v5_2_destroy_inst_ctx(struct amdgpu_device *adev)
 	int i;
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
-		if (adev->sdma.instance[i].fw != NULL)
 		release_firmware(adev->sdma.instance[i].fw);
+		adev->sdma.instance[i].fw = NULL;
 
 		if (adev->asic_type == CHIP_SIENNA_CICHLID)
 			break;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -1318,15 +1318,11 @@ static int dm_sw_fini(void *handle)
 		adev->dm.dmub_srv = NULL;
 	}
 
-	if (adev->dm.dmub_fw) {
 	release_firmware(adev->dm.dmub_fw);
 	adev->dm.dmub_fw = NULL;
-	}
 
-	if(adev->dm.fw_dmcu) {
 	release_firmware(adev->dm.fw_dmcu);
 	adev->dm.fw_dmcu = NULL;
-	}
 
 	return 0;
 }