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of: fix unnecessary warning on missing /cpus node 

Not all DT platforms have all the cpus collected under a /cpus node.
That just happens to be a details of FDT, ePAPR and PowerPC platforms.
Sparc does something different, but unfortunately the current code
complains with a warning if /cpus isn't there. This became a problem
with commit f86e4718, "driver/core cpu: initialize of_node in cpu's
device structure", which caused the function to get called for all
architectures.

This commit is a temporary fix to fail silently if the cpus node isn't
present. A proper fix will come later to allow arch code to provide a
custom mechanism for decoding the CPU hwid if the 'reg' property isn't
appropriate.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: David Miller <davem@davemloft.net>
Cc: Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@arm.com>
Cc: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Grant Likely 2013-10-03 21:04:31 +01:00
parent 61e6cfa80d
commit 444c91e572
1 changed files with 1 additions and 3 deletions
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4
drivers/of/base.c
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@ -303,10 +303,8 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
struct device_node *cpun, *cpus;
cpus = of_find_node_by_path("/cpus");
if (!cpus) {
pr_warn("Missing cpus node, bailing out\n");
if (!cpus)
return NULL;
}
for_each_child_of_node(cpus, cpun) {
if (of_node_cmp(cpun->type, "cpu"))