[PATCH -mm] block: handle subsystem_register init errors

["Randy.Dunlap" <rdunlap@xenotime.net>]

From: Randy Dunlap <rdunlap@xenotime.net>

Check and handle init errors.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
---
 block/genhd.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

--- linux-2618-rc1mm1.orig/block/genhd.c
+++ linux-2618-rc1mm1/block/genhd.c
@@ -295,10 +295,15 @@ static struct kobject *base_probe(dev_t 
 
 static int __init genhd_device_init(void)
 {
+	int err;
+
 	bdev_map = kobj_map_init(base_probe, &block_subsys_lock);
 	blk_dev_init();
-	subsystem_register(&block_subsys);
-	return 0;
+	err = subsystem_register(&block_subsys);
+	if (err < 0)
+		printk(KERN_WARNING "%s: subsystem_register error: %d\n",
+			__FUNCTION__, err);
+	return err;
 }
 
 subsys_initcall(genhd_device_init);


---
-
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