Merge "msm: camera: common: Fix failures in v4l2 unregister during error" into camera-kernel.lnx.4.0

drivers/cam_icp/cam_icp_subdev.c

@@ -205,7 +205,7 @@ static int cam_icp_component_bind(struct device *dev,
 	g_icp_dev.open_cnt = 0;
 	mutex_init(&g_icp_dev.icp_lock);
 
-	CAM_DBG(CAM_ICP, "Component bound successfully");
+	CAM_INFO(CAM_ICP, "Component bound successfully");
 
 	return rc;
 

drivers/cam_isp/cam_isp_dev.c

@@ -161,7 +161,7 @@ static int cam_isp_dev_component_bind(struct device *dev,
 
 	mutex_init(&g_isp_dev.isp_mutex);
 
-	CAM_INFO(CAM_ISP, "ISP HW component bound successfully");
+	CAM_INFO(CAM_ISP, "Component bound successfully");
 
 	return 0;
 unregister:

drivers/cam_req_mgr/cam_req_mgr_dev.c

@@ -62,8 +62,8 @@ mdev_fail:
 
 static void cam_media_device_cleanup(void)
 {
-	media_entity_cleanup(&g_dev.video->entity);
 	media_device_unregister(g_dev.v4l2_dev->mdev);
+	media_device_cleanup(g_dev.v4l2_dev->mdev);
 	kfree(g_dev.v4l2_dev->mdev);
 	g_dev.v4l2_dev->mdev = NULL;
 }
@@ -575,7 +575,7 @@ static int cam_video_device_setup(void)
 
 	strlcpy(g_dev.video->name, "cam-req-mgr",
 		sizeof(g_dev.video->name));
-	g_dev.video->release = video_device_release;
+	g_dev.video->release = video_device_release_empty;
 	g_dev.video->fops = &g_cam_fops;
 	g_dev.video->ioctl_ops = &g_cam_ioctl_ops;
 	g_dev.video->minor = -1;
@@ -630,6 +630,7 @@ EXPORT_SYMBOL(cam_req_mgr_notify_message);
 
 void cam_video_device_cleanup(void)
 {
+	media_entity_cleanup(&g_dev.video->entity);
 	video_unregister_device(g_dev.video);
 	video_device_release(g_dev.video);
 	g_dev.video = NULL;
@@ -640,7 +641,7 @@ int cam_register_subdev(struct cam_subdev *csd)
 	struct v4l2_subdev *sd;
 	int rc;
 
-	if (g_dev.state != true) {
+	if (!g_dev.state) {
 		CAM_ERR(CAM_CRM, "camera root device not ready yet");
 		return -ENODEV;
 	}
@@ -651,6 +652,15 @@ int cam_register_subdev(struct cam_subdev *csd)
 	}
 
 	mutex_lock(&g_dev.dev_lock);
+	if ((g_dev.subdev_nodes_created) &&
+		(csd->sd_flags & V4L2_SUBDEV_FL_HAS_DEVNODE)) {
+		CAM_ERR(CAM_CRM,
+			"dynamic node is not allowed, name: %s, type :%d",
+			csd->name, csd->ent_function);
+		rc = -EINVAL;
+		goto reg_fail;
+	}
+
 	sd = &csd->sd;
 	v4l2_subdev_init(sd, csd->ops);
 	sd->internal_ops = csd->internal_ops;
@@ -662,34 +672,12 @@ int cam_register_subdev(struct cam_subdev *csd)
 	sd->entity.pads = NULL;
 	sd->entity.function = csd->ent_function;
 
-	if (csd->subdev_node_created) {
-		CAM_ERR(CAM_CRM,
-			"Dynamic Node is not allowed, name: %s, type: %d",
-			csd->name, csd->ent_function);
-		rc = -EINVAL;
-		goto reg_fail;
-	}
-
 	rc = v4l2_device_register_subdev(g_dev.v4l2_dev, sd);
 	if (rc) {
 		CAM_ERR(CAM_CRM, "register subdev failed");
 		goto reg_fail;
 	}
 
-	rc = v4l2_device_register_subdev_nodes(g_dev.v4l2_dev);
-	if (rc) {
-		CAM_ERR(CAM_CRM,
-			"Device Register subdev node failed: rc = %d", rc);
-		goto reg_fail;
-
-	}
-
-	if ((sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE)) {
-		sd->entity.name = video_device_node_name(sd->devnode);
-		CAM_DBG(CAM_CRM, "created node :%s", sd->entity.name);
-	}
-
-	csd->subdev_node_created = true;
 	g_dev.count++;
 
 reg_fail:
@@ -700,7 +688,7 @@ EXPORT_SYMBOL(cam_register_subdev);
 
 int cam_unregister_subdev(struct cam_subdev *csd)
 {
-	if (g_dev.state != true) {
+	if (!g_dev.state) {
 		CAM_ERR(CAM_CRM, "camera root device not ready yet");
 		return -ENODEV;
 	}
@@ -714,6 +702,47 @@ int cam_unregister_subdev(struct cam_subdev *csd)
 }
 EXPORT_SYMBOL(cam_unregister_subdev);
 
+static int cam_dev_mgr_create_subdev_nodes(void)
+{
+	int rc;
+	struct v4l2_subdev *sd;
+
+	if (!g_dev.v4l2_dev) {
+		CAM_ERR(CAM_CRM, "V4L2 device not initialized");
+		return -EINVAL;
+	}
+
+	if (!g_dev.state) {
+		CAM_ERR(CAM_CRM, "camera root device not ready");
+		return -ENODEV;
+	}
+
+	mutex_lock(&g_dev.dev_lock);
+	if (g_dev.subdev_nodes_created) {
+		rc = -EEXIST;
+		goto create_fail;
+	}
+
+	rc = v4l2_device_register_subdev_nodes(g_dev.v4l2_dev);
+	if (rc) {
+		CAM_ERR(CAM_CRM, "failed to register the sub devices");
+		goto create_fail;
+	}
+
+	list_for_each_entry(sd, &g_dev.v4l2_dev->subdevs, list) {
+		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE))
+			continue;
+		sd->entity.name = video_device_node_name(sd->devnode);
+		CAM_DBG(CAM_CRM, "created node :%s", sd->entity.name);
+	}
+
+	g_dev.subdev_nodes_created = true;
+
+create_fail:
+	mutex_unlock(&g_dev.dev_lock);
+	return rc;
+}
+
 static int cam_req_mgr_component_master_bind(struct device *dev)
 {
 	int rc = 0;
@@ -734,6 +763,7 @@ static int cam_req_mgr_component_master_bind(struct device *dev)
 	g_dev.open_cnt = 0;
 	mutex_init(&g_dev.cam_lock);
 	spin_lock_init(&g_dev.cam_eventq_lock);
+	g_dev.subdev_nodes_created = false;
 	mutex_init(&g_dev.dev_lock);
 
 	rc = cam_req_mgr_util_init();
@@ -748,6 +778,8 @@ static int cam_req_mgr_component_master_bind(struct device *dev)
 		goto req_mgr_core_fail;
 	}
 
+	g_dev.state = true;
+
 	if (g_cam_req_mgr_timer_cachep == NULL) {
 		g_cam_req_mgr_timer_cachep = kmem_cache_create("crm_timer",
 			sizeof(struct cam_req_mgr_timer), 64,
@@ -761,19 +793,28 @@ static int cam_req_mgr_component_master_bind(struct device *dev)
 				g_cam_req_mgr_timer_cachep->name);
 	}
 
-	g_dev.state = true;
-
-	CAM_DBG(CAM_CRM, "Binding all slave components");
+	CAM_INFO(CAM_CRM, "All probes done, binding slave components");
 	rc = component_bind_all(dev, NULL);
 	if (rc) {
 		CAM_ERR(CAM_CRM,
 			"Error in binding all components rc: %d, Camera initialization failed!",
 			rc);
-		goto req_mgr_core_fail;
+		goto req_mgr_device_deinit;
+	}
+
+	rc = cam_dev_mgr_create_subdev_nodes();
+	if (rc) {
+		CAM_ERR(CAM_CRM, "failed in creating devices for subdevs %d",
+			rc);
+		goto req_mgr_device_deinit;
 	}
 
+	CAM_INFO(CAM_CRM, "All camera components bound successfully");
+
 	return rc;
 
+req_mgr_device_deinit:
+	cam_req_mgr_core_device_deinit();
 req_mgr_core_fail:
 	cam_req_mgr_util_deinit();
 req_mgr_util_fail:
@@ -784,6 +825,7 @@ video_setup_fail:
 	cam_media_device_cleanup();
 media_setup_fail:
 	cam_v4l2_device_cleanup();
+	g_dev.state = false;
 	return rc;
 }
 
@@ -800,6 +842,7 @@ static void cam_req_mgr_component_master_unbind(struct device *dev)
 	cam_v4l2_device_cleanup();
 	mutex_destroy(&g_dev.dev_lock);
 	g_dev.state = false;
+	g_dev.subdev_nodes_created = false;
 }
 
 static const struct component_master_ops cam_req_mgr_component_master_ops = {

drivers/cam_req_mgr/cam_req_mgr_dev.h

@@ -12,6 +12,7 @@
  *
  * @video: pointer to struct video device.
  * @v4l2_dev: pointer to struct v4l2 device.
+ * @subdev_nodes_created: all subdev nodes are created for this device
  * @count: number of subdevices registered.
  * @dev_lock: lock for the subdevice count.
  * @state: state of the root device.
@@ -23,6 +24,7 @@
 struct cam_req_mgr_device {
 	struct video_device *video;
 	struct v4l2_device *v4l2_dev;
+	bool subdev_nodes_created;
 	int count;
 	struct mutex dev_lock;
 	bool state;

drivers/cam_req_mgr/cam_subdev.h

@@ -34,7 +34,6 @@
  * @ent_function:          Media entity function type. Can be:
  *                             %CAM_IFE_DEVICE_TYPE - identifies as IFE device.
  *                             %CAM_ICP_DEVICE_TYPE - identifies as ICP device.
- * @subdev_node_created:   Enabled sub-device
  *
  * Each instance of a subdev driver should create this struct, either
  * stand-alone or embedded in a larger struct. This structure should be
@@ -50,7 +49,6 @@ struct cam_subdev {
 	u32                                    sd_flags;
 	void                                  *token;
 	u32                                    ent_function;
-	bool                                   subdev_node_created;
 };
 
 /**

drivers/cam_sensor_module/cam_cci/cam_cci_dev.c

@@ -452,6 +452,7 @@ cci_no_resource:
 static void cam_cci_component_unbind(struct device *dev,
 	struct device *master_dev, void *data)
 {
+	int rc = 0;
 	struct platform_device *pdev = to_platform_device(dev);
 
 	struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
@@ -460,6 +461,10 @@ static void cam_cci_component_unbind(struct device *dev,
 
 	cam_cpas_unregister_client(cci_dev->cpas_handle);
 	cam_cci_soc_remove(pdev, cci_dev);
+	rc = cam_unregister_subdev(&(cci_dev->v4l2_dev_str));
+	if (rc < 0)
+		CAM_ERR(CAM_CCI, "Fail with cam_unregister_subdev");
+
 	devm_kfree(&pdev->dev, cci_dev);
 }
 

drivers/cam_sensor_module/cam_eeprom/cam_eeprom_dev.c

@@ -498,7 +498,7 @@ static void cam_eeprom_component_unbind(struct device *dev,
 		return;
 	}
 
-	CAM_INFO(CAM_EEPROM, "Platform driver remove invoked");
+	CAM_DBG(CAM_EEPROM, "Component unbind called for: %s", pdev->name);
 	soc_info = &e_ctrl->soc_info;
 
 	for (i = 0; i < soc_info->num_clk; i++)

drivers/cam_sensor_module/cam_sensor/cam_sensor_dev.c

@@ -295,7 +295,7 @@ static void cam_sensor_component_unbind(struct device *dev,
 		return;
 	}
 
-	CAM_INFO(CAM_SENSOR, "platform remove invoked");
+	CAM_DBG(CAM_SENSOR, "Component unbind called for: %s", pdev->name);
 	mutex_lock(&(s_ctrl->cam_sensor_mutex));
 	cam_sensor_shutdown(s_ctrl);
 	mutex_unlock(&(s_ctrl->cam_sensor_mutex));

drivers/cam_sync/cam_sync.c

@@ -1052,7 +1052,7 @@ static int cam_sync_component_bind(struct device *dev,
 
 	strlcpy(sync_dev->vdev->name, CAM_SYNC_NAME,
 				sizeof(sync_dev->vdev->name));
-	sync_dev->vdev->release  = video_device_release;
+	sync_dev->vdev->release  = video_device_release_empty;
 	sync_dev->vdev->fops     = &cam_sync_v4l2_fops;
 	sync_dev->vdev->ioctl_ops = &g_cam_sync_ioctl_ops;
 	sync_dev->vdev->minor     = -1;
@@ -1102,6 +1102,7 @@ v4l2_fail:
 register_fail:
 	cam_sync_media_controller_cleanup(sync_dev);
 mcinit_fail:
+	video_unregister_device(sync_dev->vdev);
 	video_device_release(sync_dev->vdev);
 vdev_fail:
 	mutex_destroy(&sync_dev->table_lock);
@@ -1116,6 +1117,7 @@ static void cam_sync_component_unbind(struct device *dev,
 
 	v4l2_device_unregister(sync_dev->vdev->v4l2_dev);
 	cam_sync_media_controller_cleanup(sync_dev);
+	video_unregister_device(sync_dev->vdev);
 	video_device_release(sync_dev->vdev);
 	debugfs_remove_recursive(sync_dev->dentry);
 	sync_dev->dentry = NULL;

drivers/camera_main.c

@@ -87,7 +87,7 @@ static const struct camera_submodule_component camera_isp[] = {
 };
 
 static const struct camera_submodule_component camera_tfe[] = {
-#if IS_ENABLED(CONFIG_SPECTRA_TFE)
+#ifdef CONFIG_SPECTRA_TFE
 	{&cam_top_tpg_init_module, &cam_top_tpg_exit_module},
 	{&cam_tfe_init_module, &cam_tfe_exit_module},
 	{&cam_tfe_csid530_init_module, &cam_tfe_csid530_exit_module},
@@ -384,7 +384,7 @@ static int camera_init(void)
 		}
 	}
 
-	CAM_INFO(CAM_UTIL, "Spectra camera driver initialized!");
+	CAM_INFO(CAM_UTIL, "Spectra camera driver initcalls done");
 
 end_init:
 	return rc;