[media] media_device: move allocation out of media_device_*_init

Right now, media_device_pci_init and media_device_usb_init does
media_device allocation internaly. That preents its usage when
the media_device struct is embedded on some other structure.

Move memory allocation outside it, to make it more generic.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

9 files changed, 55 insertions, 56 deletions

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index fe376b6b5244..6613723f5eb8 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -755,16 +755,11 @@ struct media_device *media_device_find_devres(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(media_device_find_devres);
 
-struct media_device *media_device_pci_init(struct pci_dev *pci_dev,
-                                           const char *name)
+void media_device_pci_init(struct media_device *mdev,
+                           struct pci_dev *pci_dev,
+                           const char *name)
 {
 #ifdef CONFIG_PCI
-        struct media_device *mdev;
-
-        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
-        if (!mdev)
-                return NULL;
-
         mdev->dev = &pci_dev->dev;
 
         if (name)
@@ -780,25 +775,16 @@ struct media_device *media_device_pci_init(struct pci_dev *pci_dev,
         mdev->driver_version = LINUX_VERSION_CODE;
 
         media_device_init(mdev);
-
-        return mdev;
-#else
-        return NULL;
 #endif
 }
 EXPORT_SYMBOL_GPL(media_device_pci_init);
 
-struct media_device *__media_device_usb_init(struct usb_device *udev,
-                                             const char *board_name,
-                                             const char *driver_name)
+void __media_device_usb_init(struct media_device *mdev,
+                             struct usb_device *udev,
+                             const char *board_name,
+                             const char *driver_name)
 {
 #ifdef CONFIG_USB
-        struct media_device *mdev;
-
-        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
-        if (!mdev)
-                return NULL;
-
         mdev->dev = &udev->dev;
 
         if (driver_name)
@@ -818,10 +804,6 @@ struct media_device *__media_device_usb_init(struct usb_device *udev,
         mdev->driver_version = LINUX_VERSION_CODE;
 
         media_device_init(mdev);
-
-        return mdev;
-#else
-        return NULL;
 #endif
 }
 EXPORT_SYMBOL_GPL(__media_device_usb_init);
diff --git a/drivers/media/pci/saa7134/saa7134-core.c b/drivers/media/pci/saa7134/saa7134-core.c
index 8ae65bb320a3..2e77a5a80119 100644
--- a/drivers/media/pci/saa7134/saa7134-core.c
+++ b/drivers/media/pci/saa7134/saa7134-core.c
@@ -1043,11 +1043,12 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
         sprintf(dev->name, "saa%x[%d]", pci_dev->device, dev->nr);
 
 #ifdef CONFIG_MEDIA_CONTROLLER
-        dev->media_dev = media_device_pci_init(pci_dev, dev->name);
+        dev->media_dev = kzalloc(sizeof(*dev->media_dev), GFP_KERNEL);
         if (!dev->media_dev) {
                 err = -ENOMEM;
                 goto fail0;
         }
+        media_device_pci_init(dev->media_dev, pci_dev, dev->name);
         dev->v4l2_dev.mdev = dev->media_dev;
 #endif
 
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index cfcd08ec388f..5fea4adef90b 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -191,13 +191,15 @@ static int au0828_media_device_init(struct au0828_dev *dev,
 #ifdef CONFIG_MEDIA_CONTROLLER
         struct media_device *mdev;
 
-        if (!dev->board.name)
-                mdev = media_device_usb_init(udev, "unknown au0828");
-        else
-                mdev = media_device_usb_init(udev, dev->board.name);
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
         if (!mdev)
                 return -ENOMEM;
 
+        if (!dev->board.name)
+                media_device_usb_init(mdev, udev, "unknown au0828");
+        else
+                media_device_usb_init(mdev, udev, dev->board.name);
+
         dev->media_dev = mdev;
 #endif
         return 0;
diff --git a/drivers/media/usb/cx231xx/cx231xx-cards.c b/drivers/media/usb/cx231xx/cx231xx-cards.c
index 29bd7536feed..c63248a18823 100644
--- a/drivers/media/usb/cx231xx/cx231xx-cards.c
+++ b/drivers/media/usb/cx231xx/cx231xx-cards.c
@@ -1212,10 +1212,12 @@ static int cx231xx_media_device_init(struct cx231xx *dev,
 #ifdef CONFIG_MEDIA_CONTROLLER
         struct media_device *mdev;
 
-        mdev = media_device_usb_init(udev, dev->board.name);
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
         if (!mdev)
                 return -ENOMEM;
 
+        media_device_usb_init(mdev, udev, dev->board.name);
+
         dev->media_dev = mdev;
 #endif
         return 0;
diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
index 58250250a443..3fbb2cd19f5e 100644
--- a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
+++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
@@ -408,10 +408,12 @@ static int dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
         struct dvb_usb_device *d = adap_to_d(adap);
         struct usb_device *udev = d->udev;
 
-        mdev = media_device_usb_init(udev, d->name);
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
         if (!mdev)
                 return -ENOMEM;
 
+        media_device_usb_init(mdev, udev, d->name);
+
         dvb_register_media_controller(&adap->dvb_adap, mdev);
 
         dev_info(&d->udev->dev, "media controller created\n");
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
index 7509408b0b8e..6477b04e95c7 100644
--- a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
+++ b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
@@ -103,7 +103,11 @@ static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
         struct dvb_usb_device *d = adap->dev;
         struct usb_device *udev = d->udev;
 
-        mdev = media_device_usb_init(udev, d->desc->name);
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+        if (!mdev)
+                return -ENOMEM;
+
+        media_device_usb_init(mdev, udev, d->desc->name);
 
         dvb_register_media_controller(&adap->dvb_adap, mdev);
 
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index 0bae26325253..1f4047b3f3f7 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3019,17 +3019,17 @@ static int em28xx_media_device_init(struct em28xx *dev,
 #ifdef CONFIG_MEDIA_CONTROLLER
         struct media_device *mdev;
 
-        if (udev->product) {
-                mdev = media_device_usb_init(udev, udev->product);
-        } else if (udev->manufacturer) {
-                mdev = media_device_usb_init(udev, udev->manufacturer);
-        } else {
-                mdev = media_device_usb_init(udev, dev->name);
-        }
-
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
         if (!mdev)
                 return -ENOMEM;
 
+        if (udev->product)
+                media_device_usb_init(mdev, udev, udev->product);
+        else if (udev->manufacturer)
+                media_device_usb_init(mdev, udev, udev->manufacturer);
+        else
+                media_device_usb_init(mdev, udev, dev->name);
+
         dev->media_dev = mdev;
 #endif
         return 0;
diff --git a/drivers/media/usb/siano/smsusb.c b/drivers/media/usb/siano/smsusb.c
index 4a0def1e1528..c2e25876e93b 100644
--- a/drivers/media/usb/siano/smsusb.c
+++ b/drivers/media/usb/siano/smsusb.c
@@ -367,10 +367,12 @@ static void *siano_media_device_register(struct smsusb_device_t *dev,
         struct sms_board *board = sms_get_board(board_id);
         int ret;
 
-        mdev = media_device_usb_init(udev, board->name);
+        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
         if (!mdev)
                 return NULL;
 
+        media_device_usb_init(mdev, udev, board->name);
+
         ret = media_device_register(mdev);
         if (ret) {
                 media_device_cleanup(mdev);
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 2d144fed936e..49dda6c7e664 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -550,16 +550,19 @@ struct media_device *media_device_find_devres(struct device *dev);
  * media_device_pci_init() - create and initialize a
  *      struct &media_device from a PCI device.
  *
+ * @mdev:       pointer to struct &media_device
  * @pci_dev:    pointer to struct pci_dev
  * @name:       media device name. If %NULL, the routine will use the default
  *              name for the pci device, given by pci_name() macro.
  */
-struct media_device *media_device_pci_init(struct pci_dev *pci_dev,
-                                           const char *name);
+void media_device_pci_init(struct media_device *mdev,
+                           struct pci_dev *pci_dev,
+                           const char *name);
 /**
  * __media_device_usb_init() - create and initialize a
  *      struct &media_device from a PCI device.
  *
+ * @mdev:       pointer to struct &media_device
  * @udev:       pointer to struct usb_device
  * @board_name: media device name. If %NULL, the routine will use the usb
  *              product name, if available.
@@ -570,9 +573,10 @@ struct media_device *media_device_pci_init(struct pci_dev *pci_dev,
  * NOTE: It is better to call media_device_usb_init() instead, as
  * such macro fills driver_name with %KBUILD_MODNAME.
  */
-struct media_device *__media_device_usb_init(struct usb_device *udev,
-                                             const char *board_name,
-                                             const char *driver_name);
+void __media_device_usb_init(struct media_device *mdev,
+                             struct usb_device *udev,
+                             const char *board_name,
+                             const char *driver_name);
 
 #else
 static inline int media_device_register(struct media_device *mdev)
@@ -599,24 +603,24 @@ static inline struct media_device *media_device_find_devres(struct device *dev)
         return NULL;
 }
 
-static inline
-struct media_device *media_device_pci_init(struct pci_dev *pci_dev,
-                                           char *name)
+static inline void media_device_pci_init(struct media_device *mdev,
+                                         struct pci_dev *pci_dev,
+                                         char *name)
 {
         return NULL;
 }
 
-static inline
-struct media_device *__media_device_usb_init(struct usb_device *udev,
-                                             char *board_name,
-                                             char *driver_name)
+static inline void __media_device_usb_init(struct media_device *mdev,
+                                           struct usb_device *udev,
+                                           char *board_name,
+                                           char *driver_name)
 {
         return NULL;
 }
 
 #endif /* CONFIG_MEDIA_CONTROLLER */
 
-#define media_device_usb_init(udev, name) \
-        __media_device_usb_init(udev, name, KBUILD_MODNAME)
+#define media_device_usb_init(mdev, udev, name) \
+        __media_device_usb_init(mdev, udev, name, KBUILD_MODNAME)
 
 #endif