[PATCH] v4l: saa7134 module

- fix saa7134 module loading issues.
Signed-off-by: Gerd Knorr <kraxel@bytesex.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/media/video/saa7134/saa7134-core.c

@@ -222,6 +222,49 @@ static void dump_statusregs(struct saa7134_dev *dev)
 }
 #endif
 
+/* ----------------------------------------------------------- */
+/* delayed request_module                                      */
+
+static int need_empress;
+static int need_dvb;
+
+static int pending_call(struct notifier_block *self, unsigned long state,
+			void *module)
+{
+	if (module != THIS_MODULE || state != MODULE_STATE_LIVE)
+		return NOTIFY_DONE;
+
+        if (need_empress)
+                request_module("saa7134-empress");
+        if (need_dvb)
+                request_module("saa7134-dvb");
+	return NOTIFY_DONE;
+}
+
+static int pending_registered;
+static struct notifier_block pending_notifier = {
+	.notifier_call = pending_call,
+};
+
+static void request_module_depend(char *name, int *flag)
+{
+	switch (THIS_MODULE->state) {
+	case MODULE_STATE_COMING:
+		if (!pending_registered) {
+			register_module_notifier(&pending_notifier);
+			pending_registered = 1;
+		}
+		*flag = 1;
+		break;
+	case MODULE_STATE_LIVE:
+		request_module(name);
+		break;
+	default:
+		/* nothing */;
+		break;
+	}
+}
+
 /* ------------------------------------------------------------------ */
 
 /* nr of (saa7134-)pages for the given buffer size */
@@ -941,11 +984,11 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 	if (dev->tda9887_conf)
 		request_module("tda9887");
   	if (card_is_empress(dev)) {
-		request_module("saa7134-empress");
 		request_module("saa6752hs");
+		request_module_depend("saa7134-empress",&need_empress);
 	}
   	if (card_is_dvb(dev))
-		request_module("saa7134-dvb");
+		request_module_depend("saa7134-dvb",&need_dvb);
 
 	v4l2_prio_init(&dev->prio);