linux-kernel - [PATCH 1/2] media: omap3isp fix media_entity_cleanup() after media device unregister

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Message-Id: <adae92a88cf8f25e022fdf46b8be7cb23e07465b.1481829722.git.shuahkh@osg.samsung.com>
Date:   Thu, 15 Dec 2016 12:40:07 -0700
From:   Shuah Khan <shuahkh@....samsung.com>
To:     sakari.ailus@...ux.intel.com, laurent.pinchart@...asonboard.com,
        mchehab@...nel.org
Cc:     Shuah Khan <shuahkh@....samsung.com>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] media: omap3isp fix media_entity_cleanup() after media device unregister

During unbind isp_remove() media_entity_cleanup() after it unregisters the
media_device. Cleanup routine calls media_entity_cleanup() accessing subdev
entities that have been removed. This will cause problems during unbind.

Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
 drivers/media/platform/omap3isp/ispccdc.c    | 1 -
 drivers/media/platform/omap3isp/ispccp2.c    | 1 -
 drivers/media/platform/omap3isp/ispcsi2.c    | 1 -
 drivers/media/platform/omap3isp/isppreview.c | 1 -
 drivers/media/platform/omap3isp/ispresizer.c | 1 -
 drivers/media/platform/omap3isp/ispstat.c    | 1 -
 drivers/media/platform/omap3isp/ispvideo.c   | 1 -
 7 files changed, 7 deletions(-)

diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c
index 882310e..6d27e48 100644
--- a/drivers/media/platform/omap3isp/ispccdc.c
+++ b/drivers/media/platform/omap3isp/ispccdc.c
@@ -2726,7 +2726,6 @@ void omap3isp_ccdc_cleanup(struct isp_device *isp)
 	struct isp_ccdc_device *ccdc = &isp->isp_ccdc;
 
 	omap3isp_video_cleanup(&ccdc->video_out);
-	media_entity_cleanup(&ccdc->subdev.entity);
 
 	/* Free LSC requests. As the CCDC is stopped there's no active request,
 	 * so only the pending request and the free queue need to be handled.
diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
index ca09523..4c1e7f0 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -1162,5 +1162,4 @@ void omap3isp_ccp2_cleanup(struct isp_device *isp)
 	struct isp_ccp2_device *ccp2 = &isp->isp_ccp2;
 
 	omap3isp_video_cleanup(&ccp2->video_in);
-	media_entity_cleanup(&ccp2->subdev.entity);
 }
diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
index f75a1be..840756e 100644
--- a/drivers/media/platform/omap3isp/ispcsi2.c
+++ b/drivers/media/platform/omap3isp/ispcsi2.c
@@ -1318,5 +1318,4 @@ void omap3isp_csi2_cleanup(struct isp_device *isp)
 	struct isp_csi2_device *csi2a = &isp->isp_csi2a;
 
 	omap3isp_video_cleanup(&csi2a->video_out);
-	media_entity_cleanup(&csi2a->subdev.entity);
 }
diff --git a/drivers/media/platform/omap3isp/isppreview.c b/drivers/media/platform/omap3isp/isppreview.c
index ac30a0f..a179dac 100644
--- a/drivers/media/platform/omap3isp/isppreview.c
+++ b/drivers/media/platform/omap3isp/isppreview.c
@@ -2348,5 +2348,4 @@ void omap3isp_preview_cleanup(struct isp_device *isp)
 	v4l2_ctrl_handler_free(&prev->ctrls);
 	omap3isp_video_cleanup(&prev->video_in);
 	omap3isp_video_cleanup(&prev->video_out);
-	media_entity_cleanup(&prev->subdev.entity);
 }
diff --git a/drivers/media/platform/omap3isp/ispresizer.c b/drivers/media/platform/omap3isp/ispresizer.c
index 0b6a875..d22a54a 100644
--- a/drivers/media/platform/omap3isp/ispresizer.c
+++ b/drivers/media/platform/omap3isp/ispresizer.c
@@ -1791,5 +1791,4 @@ void omap3isp_resizer_cleanup(struct isp_device *isp)
 
 	omap3isp_video_cleanup(&res->video_in);
 	omap3isp_video_cleanup(&res->video_out);
-	media_entity_cleanup(&res->subdev.entity);
 }
diff --git a/drivers/media/platform/omap3isp/ispstat.c b/drivers/media/platform/omap3isp/ispstat.c
index 1b9217d..47b8e43 100644
--- a/drivers/media/platform/omap3isp/ispstat.c
+++ b/drivers/media/platform/omap3isp/ispstat.c
@@ -1055,7 +1055,6 @@ int omap3isp_stat_init(struct ispstat *stat, const char *name,
 
 void omap3isp_stat_cleanup(struct ispstat *stat)
 {
-	media_entity_cleanup(&stat->subdev.entity);
 	mutex_destroy(&stat->ioctl_lock);
 	isp_stat_bufs_free(stat);
 	kfree(stat->buf);
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index 7354469..6914035 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -1470,7 +1470,6 @@ int omap3isp_video_init(struct isp_video *video, const char *name)
 
 void omap3isp_video_cleanup(struct isp_video *video)
 {
-	media_entity_cleanup(&video->video.entity);
 	mutex_destroy(&video->queue_lock);
 	mutex_destroy(&video->stream_lock);
 	mutex_destroy(&video->mutex);
-- 
2.7.4