diff options
| author | Greg Kroah-Hartman <gregkh@suse.de> | 2009-04-16 01:00:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-04-17 01:17:11 +0200 |
| commit | 014c90dbb9b63bae067afc80a7931a76c5268ae3 (patch) | |
| tree | 0cdea5ea29cc1cee3ec2f03baf7afc3d6a4d45be /drivers | |
| parent | dynamic debug: resurrect old pr_debug() semantics as pr_devel() (diff) | |
| download | linux-014c90dbb9b63bae067afc80a7931a76c5268ae3.tar.xz linux-014c90dbb9b63bae067afc80a7931a76c5268ae3.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | 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 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); |