PWN-Hunter/android_kernel_xiaomi_sdm845
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driver core: prevent device_for_each_child from oopsing

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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>
This commit is contained in:
Greg Kroah-Hartman 2009-04-15 16:00:12 -07:00
parent 4ccb457966
commit 014c90dbb9
1 changed files with 3 additions and 0 deletions
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3
drivers/base/core.c
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@ -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);