[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 3a43be2f545..6330b1d57b1 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 883a2825cb4..904ca8c8b17 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 2c9bffcdc5c..0c5f1cb9d99 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 b926ebbaca3..b3818356b6f 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 224b0b90404..50e593bfcfa 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 28b7cc61cba..68d539456c5 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)