| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <9812e3c0d4c9133d05a38be29044efc269d5446a.1455233153.git.shuahkh@osg.samsung.com>
Date: Thu, 11 Feb 2016 16:41:24 -0700
From: Shuah Khan <shuahkh@....samsung.com>
To: mchehab@....samsung.com, tiwai@...e.com, clemens@...isch.de,
hans.verkuil@...co.com, laurent.pinchart@...asonboard.com,
sakari.ailus@...ux.intel.com, javier@....samsung.com
Cc: Shuah Khan <shuahkh@....samsung.com>, pawel@...iak.com,
m.szyprowski@...sung.com, kyungmin.park@...sung.com,
perex@...ex.cz, arnd@...db.de, dan.carpenter@...cle.com,
tvboxspy@...il.com, crope@....fi, ruchandani.tina@...il.com,
corbet@....net, chehabrafael@...il.com, k.kozlowski@...sung.com,
stefanr@...6.in-berlin.de, inki.dae@...sung.com,
jh1009.sung@...sung.com, elfring@...rs.sourceforge.net,
prabhakar.csengg@...il.com, sw0312.kim@...sung.com,
p.zabel@...gutronix.de, ricardo.ribalda@...il.com,
labbott@...oraproject.org, pierre-louis.bossart@...ux.intel.com,
ricard.wanderlof@...s.com, julian@...st.de, takamichiho@...il.com,
dominic.sacre@....de, misterpib@...il.com, daniel@...que.org,
gtmkramer@...all.nl, normalperson@...t.net, joe@...po.co.uk,
linuxbugs@...tgam.net, johan@...ud.se, klock.android@...il.com,
nenggun.kim@...sung.com, j.anaszewski@...sung.com,
geliangtang@....com, albert@...tsing.nl,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
alsa-devel@...a-project.org
Subject: [PATCH v3 08/22] media: Media Controller non-locking __media_entity_pipeline_start/stop()
Add non-locking __media_entity_pipeline_start/stop()
interfaces to be called from code paths that hold the
graph_mutex.
Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
drivers/media/media-entity.c | 34 ++++++++++++++++++++++++----------
include/media/media-entity.h | 19 +++++++++++++++++++
2 files changed, 43 insertions(+), 10 deletions(-)
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 9b4d712..b78e4c2 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -365,8 +365,8 @@ EXPORT_SYMBOL_GPL(media_entity_graph_walk_next);
* Pipeline management
*/
-__must_check int media_entity_pipeline_start(struct media_entity *entity,
- struct media_pipeline *pipe)
+__must_check int __media_entity_pipeline_start(struct media_entity *entity,
+ struct media_pipeline *pipe)
{
struct media_device *mdev = entity->graph_obj.mdev;
struct media_entity_graph *graph = &pipe->graph;
@@ -374,8 +374,6 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity,
struct media_link *link;
int ret;
- mutex_lock(&mdev->graph_mutex);
-
if (!pipe->streaming_count++) {
ret = media_entity_graph_walk_init(&pipe->graph, mdev);
if (ret)
@@ -456,8 +454,6 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity,
}
}
- mutex_unlock(&mdev->graph_mutex);
-
return 0;
error:
@@ -487,19 +483,28 @@ error_graph_walk_start:
if (!--pipe->streaming_count)
media_entity_graph_walk_cleanup(graph);
- mutex_unlock(&mdev->graph_mutex);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(__media_entity_pipeline_start);
+__must_check int media_entity_pipeline_start(struct media_entity *entity,
+ struct media_pipeline *pipe)
+{
+ struct media_device *mdev = entity->graph_obj.mdev;
+ int ret;
+
+ mutex_lock(&mdev->graph_mutex);
+ ret = __media_entity_pipeline_start(entity, pipe);
+ mutex_unlock(&mdev->graph_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(media_entity_pipeline_start);
-void media_entity_pipeline_stop(struct media_entity *entity)
+void __media_entity_pipeline_stop(struct media_entity *entity)
{
- struct media_device *mdev = entity->graph_obj.mdev;
struct media_entity_graph *graph = &entity->pipe->graph;
struct media_pipeline *pipe = entity->pipe;
- mutex_lock(&mdev->graph_mutex);
WARN_ON(!pipe->streaming_count);
media_entity_graph_walk_start(graph, entity);
@@ -516,6 +521,15 @@ void media_entity_pipeline_stop(struct media_entity *entity)
if (!--pipe->streaming_count)
media_entity_graph_walk_cleanup(graph);
+}
+EXPORT_SYMBOL_GPL(__media_entity_pipeline_stop);
+
+void media_entity_pipeline_stop(struct media_entity *entity)
+{
+ struct media_device *mdev = entity->graph_obj.mdev;
+
+ mutex_lock(&mdev->graph_mutex);
+ __media_entity_pipeline_stop(entity);
mutex_unlock(&mdev->graph_mutex);
}
EXPORT_SYMBOL_GPL(media_entity_pipeline_stop);
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index fe485d3..d58e29d 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -832,6 +832,16 @@ media_entity_graph_walk_next(struct media_entity_graph *graph);
*/
__must_check int media_entity_pipeline_start(struct media_entity *entity,
struct media_pipeline *pipe);
+/**
+ * __media_entity_pipeline_start - Mark a pipeline as streaming
+ *
+ * @entity: Starting entity
+ * @pipe: Media pipeline to be assigned to all entities in the pipeline.
+ *
+ * Note: This is the non-locking version of media_entity_pipeline_start()
+ */
+__must_check int __media_entity_pipeline_start(struct media_entity *entity,
+ struct media_pipeline *pipe);
/**
* media_entity_pipeline_stop - Mark a pipeline as not streaming
@@ -848,6 +858,15 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity,
void media_entity_pipeline_stop(struct media_entity *entity);
/**
+ * __media_entity_pipeline_stop - Mark a pipeline as not streaming
+ *
+ * @entity: Starting entity
+ *
+ * Note: This is the non-locking version of media_entity_pipeline_stop()
+ */
+void __media_entity_pipeline_stop(struct media_entity *entity);
+
+/**
* media_devnode_create() - creates and initializes a device node interface
*
* @mdev: pointer to struct &media_device
--
2.5.0
Powered by blists - more mailing lists