From 1f4642464655e16b70c4998a92cddc94555e2a5a Mon Sep 17 00:00:00 2001 From: Steve Longerbeam Date: Sat, 24 Aug 2019 13:33:36 -0300 Subject: [PATCH] media: imx: Move capture device init to registered If the CSI is unregistered and then registered again without the driver being removed and re-probed (which will happen when the media device is removed and re-probed without also removing/re-probing the CSI), the result is the kobject error and backtrace "tried to init an initialized object". This is because the video device is left in an initialized state after being unregistered, thus the video device's underlying kobject is also left in an initialized state when the device is registered again. Fix this by moving imx_media_capture_device_init() and _remove() into csi_registered() and csi_unregistered(). This will create a new un-initialized video device when the CSI is re-registered. Do this for all the subdevices that register a capture device. Reported-by: Russell King Signed-off-by: Steve Longerbeam Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/imx/imx-ic-prpencvf.c | 25 ++++++++++++--------- drivers/staging/media/imx/imx-media-csi.c | 20 ++++++++++------- drivers/staging/media/imx/imx7-media-csi.c | 22 +++++++++--------- 3 files changed, 38 insertions(+), 29 deletions(-) diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c index 67ffa46a8e96..f8a0b21fcd02 100644 --- a/drivers/staging/media/imx/imx-ic-prpencvf.c +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c @@ -1246,6 +1246,7 @@ static int prp_s_frame_interval(struct v4l2_subdev *sd, static int prp_registered(struct v4l2_subdev *sd) { struct prp_priv *priv = sd_to_priv(sd); + struct imx_ic_priv *ic_priv = priv->ic_priv; int i, ret; u32 code; @@ -1271,17 +1272,26 @@ static int prp_registered(struct v4l2_subdev *sd) if (ret) return ret; + priv->vdev = imx_media_capture_device_init(ic_priv->ipu_dev, + &ic_priv->sd, + PRPENCVF_SRC_PAD); + if (IS_ERR(priv->vdev)) + return PTR_ERR(priv->vdev); + ret = imx_media_capture_device_register(priv->vdev); if (ret) - return ret; + goto remove_vdev; ret = prp_init_controls(priv); if (ret) - goto unreg; + goto unreg_vdev; return 0; -unreg: + +unreg_vdev: imx_media_capture_device_unregister(priv->vdev); +remove_vdev: + imx_media_capture_device_remove(priv->vdev); return ret; } @@ -1290,6 +1300,8 @@ static void prp_unregistered(struct v4l2_subdev *sd) struct prp_priv *priv = sd_to_priv(sd); imx_media_capture_device_unregister(priv->vdev); + imx_media_capture_device_remove(priv->vdev); + v4l2_ctrl_handler_free(&priv->ctrl_hdlr); } @@ -1336,12 +1348,6 @@ static int prp_init(struct imx_ic_priv *ic_priv) spin_lock_init(&priv->irqlock); timer_setup(&priv->eof_timeout_timer, prp_eof_timeout, 0); - priv->vdev = imx_media_capture_device_init(ic_priv->ipu_dev, - &ic_priv->sd, - PRPENCVF_SRC_PAD); - if (IS_ERR(priv->vdev)) - return PTR_ERR(priv->vdev); - mutex_init(&priv->lock); return 0; @@ -1352,7 +1358,6 @@ static void prp_remove(struct imx_ic_priv *ic_priv) struct prp_priv *priv = ic_priv->task_priv; mutex_destroy(&priv->lock); - imx_media_capture_device_remove(priv->vdev); } struct imx_ic_ops imx_ic_prpencvf_ops = { diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c index 773b3d6964cf..be3226933a88 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -1797,12 +1797,22 @@ static int csi_registered(struct v4l2_subdev *sd) if (ret) goto free_fim; + priv->vdev = imx_media_capture_device_init(priv->sd.dev, + &priv->sd, + CSI_SRC_PAD_IDMAC); + if (IS_ERR(priv->vdev)) { + ret = PTR_ERR(priv->vdev); + goto free_fim; + } + ret = imx_media_capture_device_register(priv->vdev); if (ret) - goto free_fim; + goto remove_vdev; return 0; +remove_vdev: + imx_media_capture_device_remove(priv->vdev); free_fim: if (priv->fim) imx_media_fim_free(priv->fim); @@ -1816,6 +1826,7 @@ static void csi_unregistered(struct v4l2_subdev *sd) struct csi_priv *priv = v4l2_get_subdevdata(sd); imx_media_capture_device_unregister(priv->vdev); + imx_media_capture_device_remove(priv->vdev); if (priv->fim) imx_media_fim_free(priv->fim); @@ -1963,11 +1974,6 @@ static int imx_csi_probe(struct platform_device *pdev) imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), priv->sd.grp_id, ipu_get_num(priv->ipu)); - priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd, - CSI_SRC_PAD_IDMAC); - if (IS_ERR(priv->vdev)) - return PTR_ERR(priv->vdev); - mutex_init(&priv->lock); v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); @@ -1997,7 +2003,6 @@ static int imx_csi_probe(struct platform_device *pdev) free: v4l2_ctrl_handler_free(&priv->ctrl_hdlr); mutex_destroy(&priv->lock); - imx_media_capture_device_remove(priv->vdev); return ret; } @@ -2008,7 +2013,6 @@ static int imx_csi_remove(struct platform_device *pdev) v4l2_ctrl_handler_free(&priv->ctrl_hdlr); mutex_destroy(&priv->lock); - imx_media_capture_device_remove(priv->vdev); v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c index bfd6b5fbf484..57a666504bca 100644 --- a/drivers/staging/media/imx/imx7-media-csi.c +++ b/drivers/staging/media/imx/imx7-media-csi.c @@ -1119,7 +1119,16 @@ static int imx7_csi_registered(struct v4l2_subdev *sd) if (ret < 0) return ret; - return imx_media_capture_device_register(csi->vdev); + csi->vdev = imx_media_capture_device_init(csi->sd.dev, &csi->sd, + IMX7_CSI_PAD_SRC); + if (IS_ERR(csi->vdev)) + return PTR_ERR(csi->vdev); + + ret = imx_media_capture_device_register(csi->vdev); + if (ret) + imx_media_capture_device_remove(csi->vdev); + + return ret; } static void imx7_csi_unregistered(struct v4l2_subdev *sd) @@ -1127,6 +1136,7 @@ static void imx7_csi_unregistered(struct v4l2_subdev *sd) struct imx7_csi *csi = v4l2_get_subdevdata(sd); imx_media_capture_device_unregister(csi->vdev); + imx_media_capture_device_remove(csi->vdev); } static int imx7_csi_init_cfg(struct v4l2_subdev *sd, @@ -1251,11 +1261,6 @@ static int imx7_csi_probe(struct platform_device *pdev) csi->sd.grp_id = IMX_MEDIA_GRP_ID_CSI; snprintf(csi->sd.name, sizeof(csi->sd.name), "csi"); - csi->vdev = imx_media_capture_device_init(csi->sd.dev, &csi->sd, - IMX7_CSI_PAD_SRC); - if (IS_ERR(csi->vdev)) - return PTR_ERR(csi->vdev); - v4l2_ctrl_handler_init(&csi->ctrl_hdlr, 0); csi->sd.ctrl_handler = &csi->ctrl_hdlr; @@ -1269,8 +1274,6 @@ static int imx7_csi_probe(struct platform_device *pdev) return 0; free: - imx_media_capture_device_unregister(csi->vdev); - imx_media_capture_device_remove(csi->vdev); v4l2_ctrl_handler_free(&csi->ctrl_hdlr); cleanup: @@ -1298,9 +1301,6 @@ static int imx7_csi_remove(struct platform_device *pdev) v4l2_device_unregister(&imxmd->v4l2_dev); media_device_cleanup(&imxmd->md); - imx_media_capture_device_unregister(csi->vdev); - imx_media_capture_device_remove(csi->vdev); - v4l2_async_unregister_subdev(sd); v4l2_ctrl_handler_free(&csi->ctrl_hdlr);