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coresight: of_get_coresight_platform_data: Add missing of_node_put

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The of_get_coresight_platform_data iterates over the possible CPU nodes
to find a given cpu phandle. However it does not drop the reference
to the node pointer returned by the of_get_coresight_platform_data.

This patch also introduces another minor fix is to use
of_cpu_device_node_get() to replace of_get_cpu_node().

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[Leo: minor tweaks for of_get_coresight_platform_data]
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Suzuki K Poulose 2017-06-05 14:15:14 -06:00 committed by Greg Kroah-Hartman
parent 2fd95d6565
commit 04c9490035
1 changed files with 10 additions and 7 deletions
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17
drivers/hwtracing/coresight/of_coresight.c
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@ -109,7 +109,8 @@ of_get_coresight_platform_data(struct device *dev,
struct coresight_platform_data *pdata;
struct of_endpoint endpoint, rendpoint;
struct device *rdev;
struct device_node *dn;
bool found;
struct device_node *dn, *np;
struct device_node *ep = NULL;
struct device_node *rparent = NULL;
struct device_node *rport = NULL;
@ -176,17 +177,19 @@ of_get_coresight_platform_data(struct device *dev,
} while (ep);
}
/* Affinity defaults to CPU0 */
pdata->cpu = 0;
dn = of_parse_phandle(node, "cpu", 0);
for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) {
if (dn == of_get_cpu_node(cpu, NULL)) {
pdata->cpu = cpu;
for_each_possible_cpu(cpu) {
np = of_cpu_device_node_get(cpu);
found = (dn == np);
of_node_put(np);
if (found)
break;
}
}
of_node_put(dn);
/* Affinity to CPU0 if no cpu nodes are found */
pdata->cpu = found ? cpu : 0;
return pdata;
}
EXPORT_SYMBOL_GPL(of_get_coresight_platform_data);