powerpc/powernv: Don't crash if there are no OPAL consoles
Some machines might provide the console via a different mechanism such as direct access to a UART from Linux, in which case OPAL might not expose any console. In that case, the code would cause a NULL dereference. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -380,18 +380,20 @@ static int __init opal_init(void)
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pr_warn("opal: Node not found\n");
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return -ENODEV;
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}
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/* Register OPAL consoles if any ports */
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if (firmware_has_feature(FW_FEATURE_OPALv2))
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consoles = of_find_node_by_path("/ibm,opal/consoles");
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else
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consoles = of_node_get(opal_node);
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/* Register serial ports */
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for_each_child_of_node(consoles, np) {
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if (strcmp(np->name, "serial"))
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continue;
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of_platform_device_create(np, NULL, NULL);
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if (consoles) {
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for_each_child_of_node(consoles, np) {
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if (strcmp(np->name, "serial"))
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continue;
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of_platform_device_create(np, NULL, NULL);
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}
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of_node_put(consoles);
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}
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of_node_put(consoles);
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/* Find all OPAL interrupts and request them */
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irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
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