media: vimc: sen: register subdevice only after initialization

vimc_sen_add function first registers the subdevice and then
calls tpg_alloc. If tpg_alloc fails it unregisters the subdevice
and then frees vsen, this cause double free since the release
callback that follows subdevice unregistration also frees vsen.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vimc/vimc-sensor.c

@@ -358,6 +358,13 @@ struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 		goto err_free_vsen;
 	}
 
+	/* Initialize the test pattern generator */
+	tpg_init(&vsen->tpg, vsen->mbus_format.width,
+		 vsen->mbus_format.height);
+	ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
+	if (ret)
+		goto err_free_hdl;
+
 	/* Initialize ved and sd */
 	ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
 				   vcfg_name,
@@ -365,7 +372,7 @@ struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 				   (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
 				   &vimc_sen_int_ops, &vimc_sen_ops);
 	if (ret)
-		goto err_free_hdl;
+		goto err_free_tpg;
 
 	vsen->ved.process_frame = vimc_sen_process_frame;
 	vsen->dev = &vimc->pdev.dev;
@@ -373,17 +380,10 @@ struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 	/* Initialize the frame format */
 	vsen->mbus_format = fmt_default;
 
-	/* Initialize the test pattern generator */
-	tpg_init(&vsen->tpg, vsen->mbus_format.width,
-		 vsen->mbus_format.height);
-	ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
-	if (ret)
-		goto err_unregister_ent_sd;
-
 	return &vsen->ved;
 
-err_unregister_ent_sd:
-	vimc_ent_sd_unregister(&vsen->ved,  &vsen->sd);
+err_free_tpg:
+	tpg_free(&vsen->tpg);
 err_free_hdl:
 	v4l2_ctrl_handler_free(&vsen->hdl);
 err_free_vsen: