coresight: perf: deal with error condition properly
Function coresight_build_path() should return -ENOMEM when kzalloc
fails to allocated the requested memory. That way callers can deal
with the error condition in a similar way.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 98eb207..2cd7c71 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -135,7 +135,7 @@
}
for_each_cpu(cpu, mask) {
- if (event_data->path[cpu])
+ if (!(IS_ERR_OR_NULL(event_data->path[cpu])))
coresight_release_path(event_data->path[cpu]);
}
@@ -220,7 +220,7 @@
* referenced later when the path is actually needed.
*/
event_data->path[cpu] = coresight_build_path(csdev);
- if (!event_data->path[cpu])
+ if (IS_ERR(event_data->path[cpu]))
goto err;
}
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index fcbedd3..7bf00a0 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -429,7 +429,7 @@
path = kzalloc(sizeof(struct list_head), GFP_KERNEL);
if (!path)
- return NULL;
+ return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(path);