[media] omap3isp: Fix memory leaks in initialization error paths

Make sure all modules init functions clean up after themselves in case
of error.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

6 files changed, 74 insertions, 47 deletions

diff --git a/drivers/media/video/omap3isp/ispccdc.c b/drivers/media/video/omap3isp/ispccdc.c
index 3a43be2f5452..6330b1d57b1e 100644
--- a/drivers/media/video/omap3isp/ispccdc.c
+++ b/drivers/media/video/omap3isp/ispccdc.c
@@ -2224,15 +2224,21 @@ static int ccdc_init_entities(struct isp_ccdc_device *ccdc)
 
 	ret = omap3isp_video_init(&ccdc->video_out, "CCDC");
 	if (ret < 0)
-		return ret;
+		goto error_video;
 
 	/* Connect the CCDC subdev to the video node. */
 	ret = media_entity_create_link(&ccdc->subdev.entity, CCDC_PAD_SOURCE_OF,
 			&ccdc->video_out.video.entity, 0, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	return 0;
+
+error_link:
+	omap3isp_video_cleanup(&ccdc->video_out);
+error_video:
+	media_entity_cleanup(me);
+	return ret;
 }
 
 /*
@@ -2246,6 +2252,7 @@ static int ccdc_init_entities(struct isp_ccdc_device *ccdc)
 int omap3isp_ccdc_init(struct isp_device *isp)
 {
 	struct isp_ccdc_device *ccdc = &isp->isp_ccdc;
+	int ret;
 
 	spin_lock_init(&ccdc->lock);
 	init_waitqueue_head(&ccdc->wait);
@@ -2274,7 +2281,13 @@ int omap3isp_ccdc_init(struct isp_device *isp)
 	ccdc->update = OMAP3ISP_CCDC_BLCLAMP;
 	ccdc_apply_controls(ccdc);
 
-	return ccdc_init_entities(ccdc);
+	ret = ccdc_init_entities(ccdc);
+	if (ret < 0) {
+		mutex_destroy(&ccdc->ioctl_lock);
+		return ret;
+	}
+
+	return 0;
 }
 
 /*
diff --git a/drivers/media/video/omap3isp/ispccp2.c b/drivers/media/video/omap3isp/ispccp2.c
index 883a2825cb41..904ca8c8b17f 100644
--- a/drivers/media/video/omap3isp/ispccp2.c
+++ b/drivers/media/video/omap3isp/ispccp2.c
@@ -1125,15 +1125,21 @@ static int ccp2_init_entities(struct isp_ccp2_device *ccp2)
 
 	ret = omap3isp_video_init(&ccp2->video_in, "CCP2");
 	if (ret < 0)
-		return ret;
+		goto error_video;
 
 	/* Connect the video node to the ccp2 subdev. */
 	ret = media_entity_create_link(&ccp2->video_in.video.entity, 0,
 				       &ccp2->subdev.entity, CCP2_PAD_SINK, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	return 0;
+
+error_link:
+	omap3isp_video_cleanup(&ccp2->video_in);
+error_video:
+	media_entity_cleanup(&ccp2->subdev.entity);
+	return ret;
 }
 
 /*
@@ -1171,15 +1177,13 @@ int omap3isp_ccp2_init(struct isp_device *isp)
 	}
 
 	ret = ccp2_init_entities(ccp2);
-	if (ret < 0)
-		goto out;
+	if (ret < 0) {
+		regulator_put(ccp2->vdds_csib);
+		return ret;
+	}
 
 	ccp2_reset(ccp2);
-out:
-	if (ret)
-		omap3isp_ccp2_cleanup(isp);
-
-	return ret;
+	return 0;
 }
 
 /*
diff --git a/drivers/media/video/omap3isp/ispcsi2.c b/drivers/media/video/omap3isp/ispcsi2.c
index 2c9bffcdc5c9..0c5f1cb9d99d 100644
--- a/drivers/media/video/omap3isp/ispcsi2.c
+++ b/drivers/media/video/omap3isp/ispcsi2.c
@@ -1259,15 +1259,21 @@ static int csi2_init_entities(struct isp_csi2_device *csi2)
 
 	ret = omap3isp_video_init(&csi2->video_out, "CSI2a");
 	if (ret < 0)
-		return ret;
+		goto error_video;
 
 	/* Connect the CSI2 subdev to the video node. */
 	ret = media_entity_create_link(&csi2->subdev.entity, CSI2_PAD_SOURCE,
 				       &csi2->video_out.video.entity, 0, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	return 0;
+
+error_link:
+	omap3isp_video_cleanup(&csi2->video_out);
+error_video:
+	media_entity_cleanup(&csi2->subdev.entity);
+	return ret;
 }
 
 /*
@@ -1289,7 +1295,7 @@ int omap3isp_csi2_init(struct isp_device *isp)
 
 	ret = csi2_init_entities(csi2a);
 	if (ret < 0)
-		goto fail;
+		return ret;
 
 	if (isp->revision == ISP_REVISION_15_0) {
 		csi2c->isp = isp;
@@ -1302,9 +1308,6 @@ int omap3isp_csi2_init(struct isp_device *isp)
 	}
 
 	return 0;
-fail:
-	omap3isp_csi2_cleanup(isp);
-	return ret;
 }
 
 /*
diff --git a/drivers/media/video/omap3isp/isppreview.c b/drivers/media/video/omap3isp/isppreview.c
index b926ebbaca3a..b3818356b6f3 100644
--- a/drivers/media/video/omap3isp/isppreview.c
+++ b/drivers/media/video/omap3isp/isppreview.c
@@ -2060,24 +2060,32 @@ static int preview_init_entities(struct isp_prev_device *prev)
 
 	ret = omap3isp_video_init(&prev->video_in, "preview");
 	if (ret < 0)
-		return ret;
+		goto error_video_in;
 
 	ret = omap3isp_video_init(&prev->video_out, "preview");
 	if (ret < 0)
-		return ret;
+		goto error_video_out;
 
 	/* Connect the video nodes to the previewer subdev. */
 	ret = media_entity_create_link(&prev->video_in.video.entity, 0,
 			&prev->subdev.entity, PREV_PAD_SINK, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	ret = media_entity_create_link(&prev->subdev.entity, PREV_PAD_SOURCE,
 			&prev->video_out.video.entity, 0, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	return 0;
+
+error_link:
+	omap3isp_video_cleanup(&prev->video_out);
+error_video_out:
+	omap3isp_video_cleanup(&prev->video_in);
+error_video_in:
+	media_entity_cleanup(&prev->subdev.entity);
+	return ret;
 }
 
 /*
@@ -2088,21 +2096,12 @@ static int preview_init_entities(struct isp_prev_device *prev)
 int omap3isp_preview_init(struct isp_device *isp)
 {
 	struct isp_prev_device *prev = &isp->isp_prev;
-	int ret;
 
 	spin_lock_init(&prev->lock);
 	init_waitqueue_head(&prev->wait);
 	preview_init_params(prev);
 
-	ret = preview_init_entities(prev);
-	if (ret < 0)
-		goto out;
-
-out:
-	if (ret)
-		omap3isp_preview_cleanup(isp);
-
-	return ret;
+	return preview_init_entities(prev);
 }
 
 void omap3isp_preview_cleanup(struct isp_device *isp)
diff --git a/drivers/media/video/omap3isp/ispresizer.c b/drivers/media/video/omap3isp/ispresizer.c
index 224b0b90404d..50e593bfcfaf 100644
--- a/drivers/media/video/omap3isp/ispresizer.c
+++ b/drivers/media/video/omap3isp/ispresizer.c
@@ -1688,24 +1688,32 @@ static int resizer_init_entities(struct isp_res_device *res)
 
 	ret = omap3isp_video_init(&res->video_in, "resizer");
 	if (ret < 0)
-		return ret;
+		goto error_video_in;
 
 	ret = omap3isp_video_init(&res->video_out, "resizer");
 	if (ret < 0)
-		return ret;
+		goto error_video_out;
 
 	/* Connect the video nodes to the resizer subdev. */
 	ret = media_entity_create_link(&res->video_in.video.entity, 0,
 			&res->subdev.entity, RESZ_PAD_SINK, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	ret = media_entity_create_link(&res->subdev.entity, RESZ_PAD_SOURCE,
 			&res->video_out.video.entity, 0, 0);
 	if (ret < 0)
-		return ret;
+		goto error_link;
 
 	return 0;
+
+error_link:
+	omap3isp_video_cleanup(&res->video_out);
+error_video_out:
+	omap3isp_video_cleanup(&res->video_in);
+error_video_in:
+	media_entity_cleanup(&res->subdev.entity);
+	return ret;
 }
 
 /*
@@ -1716,19 +1724,10 @@ static int resizer_init_entities(struct isp_res_device *res)
 int omap3isp_resizer_init(struct isp_device *isp)
 {
 	struct isp_res_device *res = &isp->isp_res;
-	int ret;
 
 	init_waitqueue_head(&res->wait);
 	atomic_set(&res->stopping, 0);
-	ret = resizer_init_entities(res);
-	if (ret < 0)
-		goto out;
-
-out:
-	if (ret)
-		omap3isp_resizer_cleanup(isp);
-
-	return ret;
+	return resizer_init_entities(res);
 }
 
 void omap3isp_resizer_cleanup(struct isp_device *isp)
diff --git a/drivers/media/video/omap3isp/ispstat.c b/drivers/media/video/omap3isp/ispstat.c
index 28b7cc61cba6..68d539456c55 100644
--- a/drivers/media/video/omap3isp/ispstat.c
+++ b/drivers/media/video/omap3isp/ispstat.c
@@ -1074,14 +1074,23 @@ static int isp_stat_init_entities(struct ispstat *stat, const char *name,
 int omap3isp_stat_init(struct ispstat *stat, const char *name,
 		       const struct v4l2_subdev_ops *sd_ops)
 {
+	int ret;
+
 	stat->buf = kcalloc(STAT_MAX_BUFS, sizeof(*stat->buf), GFP_KERNEL);
 	if (!stat->buf)
 		return -ENOMEM;
+
 	isp_stat_buf_clear(stat);
 	mutex_init(&stat->ioctl_lock);
 	atomic_set(&stat->buf_err, 0);
 
-	return isp_stat_init_entities(stat, name, sd_ops);
+	ret = isp_stat_init_entities(stat, name, sd_ops);
+	if (ret < 0) {
+		mutex_destroy(&stat->ioctl_lock);
+		kfree(stat->buf);
+	}
+
+	return ret;
 }
 
 void omap3isp_stat_cleanup(struct ispstat *stat)