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Subject: [media] media: Use a better owner for the media device
Author:  Sakari Ailus <[email protected]>
Date:    Thu Dec 12 12:38:17 2013 -0300

mdev->fops->owner is actually the owner of the very same module which
implements media_device_register(), so it can't be unloaded anyway. Instead,
use THIS_MODULE through a macro as does video_register_device().

Signed-off-by: Sakari Ailus <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/media-device.c  |    7 ++++---
 drivers/media/media-devnode.c |    5 +++--
 include/media/media-device.h  |    4 +++-
 include/media/media-devnode.h |    3 ++-
 4 files changed, 12 insertions(+), 7 deletions(-)

---

http://git.linuxtv.org/media_tree.git?a=commitdiff;h=85de721c46ba8ad9b283b2b3e307c9a3e8425042

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index d5a7a13..51217f0 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -372,7 +372,8 @@ static void media_device_release(struct media_devnode *mdev)
  * - dev must point to the parent device
  * - model must be filled with the device model name
  */
-int __must_check media_device_register(struct media_device *mdev)
+int __must_check __media_device_register(struct media_device *mdev,
+                                        struct module *owner)
 {
        int ret;
 
@@ -388,7 +389,7 @@ int __must_check media_device_register(struct media_device 
*mdev)
        mdev->devnode.fops = &media_device_fops;
        mdev->devnode.parent = mdev->dev;
        mdev->devnode.release = media_device_release;
-       ret = media_devnode_register(&mdev->devnode);
+       ret = media_devnode_register(&mdev->devnode, owner);
        if (ret < 0)
                return ret;
 
@@ -400,7 +401,7 @@ int __must_check media_device_register(struct media_device 
*mdev)
 
        return 0;
 }
-EXPORT_SYMBOL_GPL(media_device_register);
+EXPORT_SYMBOL_GPL(__media_device_register);
 
 /**
  * media_device_unregister - unregister a media device
diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c
index fb0f046..7acd19c 100644
--- a/drivers/media/media-devnode.c
+++ b/drivers/media/media-devnode.c
@@ -232,7 +232,8 @@ static const struct file_operations media_devnode_fops = {
  * the media_devnode structure is *not* called, so the caller is responsible 
for
  * freeing any data.
  */
-int __must_check media_devnode_register(struct media_devnode *mdev)
+int __must_check media_devnode_register(struct media_devnode *mdev,
+                                       struct module *owner)
 {
        int minor;
        int ret;
@@ -253,7 +254,7 @@ int __must_check media_devnode_register(struct 
media_devnode *mdev)
 
        /* Part 2: Initialize and register the character device */
        cdev_init(&mdev->cdev, &media_devnode_fops);
-       mdev->cdev.owner = mdev->fops->owner;
+       mdev->cdev.owner = owner;
 
        ret = cdev_add(&mdev->cdev, MKDEV(MAJOR(media_dev_t), mdev->minor), 1);
        if (ret < 0) {
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 12155a9..6e6db78 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -87,7 +87,9 @@ struct media_device {
 /* media_devnode to media_device */
 #define to_media_device(node) container_of(node, struct media_device, devnode)
 
-int __must_check media_device_register(struct media_device *mdev);
+int __must_check __media_device_register(struct media_device *mdev,
+                                        struct module *owner);
+#define media_device_register(mdev) __media_device_register(mdev, THIS_MODULE)
 void media_device_unregister(struct media_device *mdev);
 
 int __must_check media_device_register_entity(struct media_device *mdev,
diff --git a/include/media/media-devnode.h b/include/media/media-devnode.h
index 3446af2..0dc7060 100644
--- a/include/media/media-devnode.h
+++ b/include/media/media-devnode.h
@@ -82,7 +82,8 @@ struct media_devnode {
 /* dev to media_devnode */
 #define to_media_devnode(cd) container_of(cd, struct media_devnode, dev)
 
-int __must_check media_devnode_register(struct media_devnode *mdev);
+int __must_check media_devnode_register(struct media_devnode *mdev,
+                                       struct module *owner);
 void media_devnode_unregister(struct media_devnode *mdev);
 
 static inline struct media_devnode *media_devnode_data(struct file *filp)

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