pvrusb2: Close potential race condition during initialization

From: Mike Isely <isely@pobox.com>

There is a callback that is issued to into pvr2_context from pvr2_hdw
after initialization is done.  There was a probability that this
callback could get missed.  Fixed.

Signed-off-by: Mike Isely <isely@pobox.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.h b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.h
index 8c0abb4e4..d2f8fa9d3 100644
--- a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.h
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.h
@@ -102,6 +102,12 @@ struct pvr2_hdw;
 struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
 				 const struct usb_device_id *devid);
 
+/* Perform second stage initialization, passing in a notification callback
+   for when the master state changes. */
+void pvr2_hdw_initialize(struct pvr2_hdw *,
+			 void (*callback_func)(void *),
+			 void *callback_data);
+
 #if 0
 /* Get pointer to structure given unit number */
 struct pvr2_hdw *pvr2_hdw_find(int unit_number);
@@ -110,11 +116,6 @@ struct pvr2_hdw *pvr2_hdw_find(int unit_number);
 /* Destroy hardware interaction structure */
 void pvr2_hdw_destroy(struct pvr2_hdw *);
 
-/* Register a function to be called whenever the master state changes. */
-void pvr2_hdw_set_state_callback(struct pvr2_hdw *,
-				 void (*callback_func)(void *),
-				 void *callback_data);
-
 /* Return true if in the ready (normal) state */
 int pvr2_hdw_dev_ok(struct pvr2_hdw *);