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[POWERPC] Add null pointer check to of_find_property

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Update function of_find_property() to return NULL if the device_node
passed to it is also NULL.  Otherwise, passing NULL will cause a null
pointer dereference.

Without this, the legacy_serial driver will crash if there's no
'chosen' node in the device tree.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Timur Tabi 2008-05-08 05:19:59 +10:00 committed by Paul Mackerras
parent cec08e7a94
commit 64e4566f6d
1 changed files with 3 additions and 0 deletions
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3
drivers/of/base.c
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@ -65,6 +65,9 @@ struct property *of_find_property(const struct device_node *np,
{
struct property *pp;
if (!np)
return NULL;
read_lock(&devtree_lock);
for (pp = np->properties; pp != 0; pp = pp->next) {
if (of_prop_cmp(pp->name, name) == 0) {