From 014c90dbb9b63bae067afc80a7931a76c5268ae3 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 15 Apr 2009 16:00:12 -0700 Subject: [PATCH] driver core: prevent device_for_each_child from oopsing David Vrabel noticed that the wireless usb stack likes to call device_for_each_chile() with an empty bus. This used to work fine, but now oopses. This patch fixes the oops and makes the code behave like it used to. Reported-by: David Vrabel Tested-by: David Vrabel Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index e73c92d13a23..d230ff4b3eec 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1142,6 +1142,9 @@ int device_for_each_child(struct device *parent, void *data, struct device *child; int error = 0; + if (!parent->p) + return 0; + klist_iter_init(&parent->p->klist_children, &i); while ((child = next_device(&i)) && !error) error = fn(child, data); -- 2.30.2