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authorSuzuki K Poulose <suzuki.poulose@arm.com>2017-06-05 23:15:14 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-09 12:45:24 +0300
commit04c9490035691a398d851fd160ce8af08ba0af0d (patch)
treebd22e56074f1f34707539b06d359e7f25a038ccc /drivers/hwtracing
parent2fd95d6565f305bc5c1f0bf9922cbff350117f04 (diff)
downloadlinux-04c9490035691a398d851fd160ce8af08ba0af0d.tar.xz
coresight: of_get_coresight_platform_data: Add missing of_node_put
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>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/of_coresight.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
index 2749853b9010..225b2dd5970c 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -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);