From: Randy Dunlap <rdunlap@xenotime.net>
Date: Fri, 29 Sep 2006 08:58:56 +0000 (-0700)
Subject: [PATCH] block: handle subsystem_register() init errors
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=87a57261105669d13a9cae747b5b67ca1cbcda3c;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] block: handle subsystem_register() init errors

Check and handle init errors.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/block/genhd.c b/block/genhd.c
index 25d1f42568cc..653919d50cd4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -295,10 +295,15 @@ static struct kobject *base_probe(dev_t dev, int *part, void *data)
 
 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);