[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>

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,
+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,
+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);

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
 

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;

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;

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");

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);
 

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;

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);

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,
+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.
@@ -570,7 +573,8 @@ 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,
+void __media_device_usb_init(struct media_device *mdev,
+			     struct usb_device *udev,
 			     const char *board_name,
 			     const char *driver_name);
 
@@ -599,15 +603,15 @@ 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,
+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,
+static inline void __media_device_usb_init(struct media_device *mdev,
+					   struct usb_device *udev,
 					   char *board_name,
 					   char *driver_name)
 {
@@ -616,7 +620,7 @@ struct media_device *__media_device_usb_init(struct usb_device *udev,
 
 #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