1 files changed, 38 insertions, 16 deletions

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 67bd58c6f397..afb44d1c9d04 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -396,6 +396,39 @@ static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
 }
 
 /* ------------------------------------------------------------------------
+ * Streaming Object Management
+ */
+
+static void uvc_stream_delete(struct uvc_streaming *stream)
+{
+	mutex_destroy(&stream->mutex);
+
+	usb_put_intf(stream->intf);
+
+	kfree(stream->format);
+	kfree(stream->header.bmaControls);
+	kfree(stream);
+}
+
+static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev,
+					    struct usb_interface *intf)
+{
+	struct uvc_streaming *stream;
+
+	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
+	if (stream == NULL)
+		return NULL;
+
+	mutex_init(&stream->mutex);
+
+	stream->dev = dev;
+	stream->intf = usb_get_intf(intf);
+	stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
+
+	return stream;
+}
+
+/* ------------------------------------------------------------------------
  * Descriptors parsing
  */
 
@@ -687,17 +720,12 @@ static int uvc_parse_streaming(struct uvc_device *dev,
 		return -EINVAL;
 	}
 
-	streaming = kzalloc(sizeof(*streaming), GFP_KERNEL);
+	streaming = uvc_stream_new(dev, intf);
 	if (streaming == NULL) {
 		usb_driver_release_interface(&uvc_driver.driver, intf);
-		return -EINVAL;
+		return -ENOMEM;
 	}
 
-	mutex_init(&streaming->mutex);
-	streaming->dev = dev;
-	streaming->intf = usb_get_intf(intf);
-	streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
-
 	/* The Pico iMage webcam has its class-specific interface descriptors
 	 * after the endpoint descriptors.
 	 */
@@ -904,10 +932,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
 
 error:
 	usb_driver_release_interface(&uvc_driver.driver, intf);
-	usb_put_intf(intf);
-	kfree(streaming->format);
-	kfree(streaming->header.bmaControls);
-	kfree(streaming);
+	uvc_stream_delete(streaming);
 	return ret;
 }
 
@@ -1815,7 +1840,7 @@ static int uvc_scan_device(struct uvc_device *dev)
  * is released.
  *
  * As this function is called after or during disconnect(), all URBs have
- * already been canceled by the USB core. There is no need to kill the
+ * already been cancelled by the USB core. There is no need to kill the
  * interrupt URB manually.
  */
 static void uvc_delete(struct kref *kref)
@@ -1853,10 +1878,7 @@ static void uvc_delete(struct kref *kref)
 		streaming = list_entry(p, struct uvc_streaming, list);
 		usb_driver_release_interface(&uvc_driver.driver,
 			streaming->intf);
-		usb_put_intf(streaming->intf);
-		kfree(streaming->format);
-		kfree(streaming->header.bmaControls);
-		kfree(streaming);
+		uvc_stream_delete(streaming);
 	}
 
 	kfree(dev);