Gitweb: http://git.kernel.org/linus/014c90dbb9b63bae067afc80a7931a76c5268ae3
Commit: 014c90dbb9b63bae067afc80a7931a76c5268ae3
Parent: 4ccb457966391295bd9b3644f6bdc9ddd97b6051
Author: Greg Kroah-Hartman <gregkh@suse.de>
AuthorDate: Wed Apr 15 16:00:12 2009 -0700
Committer: Greg Kroah-Hartman <gregkh@suse.de>
CommitDate: Thu Apr 16 16:17:11 2009 -0700
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 <david.vrabel@csr.com>
Tested-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/base/core.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index e73c92d..d230ff4 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);
--
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