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of/flattree: Fix crash when device tree absent

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This patch fixes the condition where device tree support is compiled
in, but no device tree was proved by firmware.  It makes
of_platform_bus_probe() explicitly check for a NULL device tree
pointer.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely 2010-06-08 07:48:25 -06:00
parent f1d4c3a769
commit 60d5991330
1 changed files with 2 additions and 0 deletions
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2
drivers/of/platform.c
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@ -617,6 +617,8 @@ int of_platform_bus_probe(struct device_node *root,
root = of_find_node_by_path("/");
else
of_node_get(root);
if (root == NULL)
return -EINVAL;
pr_debug("of_platform_bus_probe()\n");
pr_debug(" starting at: %s\n", root->full_name);