From 29591b92e19f409d5ad4c099c2b7b5ea56f50dfa Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Tue, 22 Apr 2008 22:57:50 +0200
Subject: [PATCH] bus_remove_device: be more careful about incomplete
initialization
Prevent bus_remove_device() from crashing if dev->knode_bus has not been
initialized before it's called.
This can happen if the device_add() ended up breaking out early due to
an error, for example.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/base/bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index be1cc5143354..ef522ae55480 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -530,7 +530,8 @@ void bus_remove_device(struct device *dev)
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev->bus_id);
device_remove_attrs(dev->bus, dev);
- klist_del(&dev->knode_bus);
+ if (klist_node_attached(&dev->knode_bus))
+ klist_del(&dev->knode_bus);
pr_debug("bus: '%s': remove device %s\n",
dev->bus->name, dev->bus_id);
--
2.20.1