linux-kernel - [PATCH update] ieee1394: fix host device registering when nodemgr disabled

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Message-ID: <tkrat.e12859f4e3703b6b@s5r6.in-berlin.de>
Date:	Tue, 6 Feb 2007 02:20:06 +0100 (CET)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Robert Crocombe <rcrocomb@...il.com>
cc:	linux1394-devel <linux1394-devel@...ts.sourceforge.net>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH update] ieee1394: fix host device registering when nodemgr
 disabled

Since my commit 8252bbb1363b7fe963a3eb6f8a36da619a6f5a65 in 2.6.20-rc1,
host devices have a dummy driver attached.  Alas the driver was not
registered before use if ieee1394 was loaded with disable_nodemgr=1.

Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---

Update:  - work without extern variables,
         - better error checks,
	 - add missing driver_unregister.

 drivers/ieee1394/nodemgr.c |   26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

Index: linux-2.6.20-rc5/drivers/ieee1394/nodemgr.c
===================================================================
--- linux-2.6.20-rc5.orig/drivers/ieee1394/nodemgr.c
+++ linux-2.6.20-rc5/drivers/ieee1394/nodemgr.c
@@ -258,7 +258,6 @@ static struct device_driver nodemgr_mid_
 struct device nodemgr_dev_template_host = {
 	.bus		= &ieee1394_bus_type,
 	.release	= nodemgr_release_host,
-	.driver		= &nodemgr_mid_layer_driver,
 };
 
 
@@ -1850,22 +1849,33 @@ int init_ieee1394_nodemgr(void)
 
 	error = class_register(&nodemgr_ne_class);
 	if (error)
-		return error;
-
+		goto fail_ne;
 	error = class_register(&nodemgr_ud_class);
-	if (error) {
-		class_unregister(&nodemgr_ne_class);
-		return error;
-	}
+	if (error)
+		goto fail_ud;
+
+	/* don't show this driver if nodemgr is off (disable_nodmgr=1) */
+	nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
+
 	error = driver_register(&nodemgr_mid_layer_driver);
+	if (error)
+		goto fail_ml;
+
 	hpsb_register_highlevel(&nodemgr_highlevel);
 	return 0;
+
+fail_ml:
+	class_unregister(&nodemgr_ud_class);
+fail_ud:
+	class_unregister(&nodemgr_ne_class);
+fail_ne:
+	return error;
 }
 
 void cleanup_ieee1394_nodemgr(void)
 {
 	hpsb_unregister_highlevel(&nodemgr_highlevel);
-
+	driver_unregister(&nodemgr_mid_layer_driver);
 	class_unregister(&nodemgr_ud_class);
 	class_unregister(&nodemgr_ne_class);
 }


-- 
Stefan Richter
-=====-=-=== --=- --==-
http://arcgraph.de/sr/

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